15 stages, 2 taps:  (3 sets)

[15, 14]
[15, 11]
[15, 8]


15 stages, 4 taps:  (41 sets)

[15, 14, 13, 11]
[15, 14, 13, 8]
[15, 14, 13, 1]
[15, 14, 12, 3]
[15, 14, 12, 2]
[15, 14, 11, 8]
[15, 14, 11, 6]
[15, 14, 11, 1]
[15, 14, 10, 5]
[15, 14, 10, 2]
[15, 14, 9, 8]
[15, 14, 9, 3]
[15, 14, 9, 2]
[15, 14, 8, 5]
[15, 14, 8, 4]
[15, 14, 7, 2]
[15, 14, 6, 3]
[15, 14, 5, 2]
[15, 13, 12, 10]
[15, 13, 11, 10]
[15, 13, 11, 7]
[15, 13, 10, 8]
[15, 13, 10, 7]
[15, 13, 10, 3]
[15, 13, 10, 2]
[15, 13, 9, 6]
[15, 13, 8, 7]
[15, 13, 7, 4]
[15, 13, 7, 3]
[15, 12, 11, 5]
[15, 12, 11, 3]
[15, 12, 9, 4]
[15, 12, 8, 6]
[15, 12, 8, 3]
[15, 12, 7, 4]
[15, 12, 6, 5]
[15, 11, 10, 5]
[15, 11, 6, 5]
[15, 10, 9, 7]
[15, 10, 8, 7]
[15, 10, 8, 5]


15 stages, 6 taps:  (235 sets)

[15, 14, 13, 12, 11, 9]
[15, 14, 13, 12, 11, 3]
[15, 14, 13, 12, 11, 1]
[15, 14, 13, 12, 10, 5]
[15, 14, 13, 12, 10, 2]
[15, 14, 13, 12, 9, 8]
[15, 14, 13, 12, 8, 6]
[15, 14, 13, 12, 8, 4]
[15, 14, 13, 12, 7, 2]
[15, 14, 13, 12, 6, 2]
[15, 14, 13, 12, 5, 3]
[15, 14, 13, 12, 3, 2]
[15, 14, 13, 12, 2, 1]
[15, 14, 13, 11, 10, 9]
[15, 14, 13, 11, 10, 5]
[15, 14, 13, 11, 10, 4]
[15, 14, 13, 11, 10, 3]
[15, 14, 13, 11, 9, 7]
[15, 14, 13, 11, 9, 3]
[15, 14, 13, 11, 8, 5]
[15, 14, 13, 11, 8, 1]
[15, 14, 13, 11, 7, 6]
[15, 14, 13, 11, 7, 4]
[15, 14, 13, 11, 7, 3]
[15, 14, 13, 11, 6, 1]
[15, 14, 13, 10, 9, 8]
[15, 14, 13, 10, 9, 5]
[15, 14, 13, 10, 9, 2]
[15, 14, 13, 10, 8, 7]
[15, 14, 13, 10, 8, 1]
[15, 14, 13, 10, 7, 5]
[15, 14, 13, 10, 7, 4]
[15, 14, 13, 10, 7, 2]
[15, 14, 13, 10, 6, 3]
[15, 14, 13, 10, 5, 4]
[15, 14, 13, 9, 8, 4]
[15, 14, 13, 9, 7, 6]
[15, 14, 13, 9, 7, 5]
[15, 14, 13, 9, 7, 2]
[15, 14, 13, 9, 6, 2]
[15, 14, 13, 9, 5, 4]
[15, 14, 13, 9, 5, 1]
[15, 14, 13, 9, 4, 3]
[15, 14, 13, 9, 2, 1]
[15, 14, 13, 8, 6, 4]
[15, 14, 13, 8, 6, 3]
[15, 14, 13, 8, 5, 4]
[15, 14, 13, 8, 3, 1]
[15, 14, 13, 7, 6, 2]
[15, 14, 13, 7, 5, 4]
[15, 14, 13, 7, 5, 3]
[15, 14, 13, 7, 3, 2]
[15, 14, 13, 6, 3, 1]
[15, 14, 13, 5, 4, 2]
[15, 14, 12, 11, 10, 6]
[15, 14, 12, 11, 9, 2]
[15, 14, 12, 11, 8, 6]
[15, 14, 12, 11, 8, 3]
[15, 14, 12, 11, 7, 6]
[15, 14, 12, 11, 7, 3]
[15, 14, 12, 11, 6, 3]
[15, 14, 12, 11, 4, 1]
[15, 14, 12, 11, 3, 2]
[15, 14, 12, 10, 9, 2]
[15, 14, 12, 10, 7, 6]
[15, 14, 12, 10, 6, 5]
[15, 14, 12, 10, 5, 3]
[15, 14, 12, 10, 4, 2]
[15, 14, 12, 9, 8, 7]
[15, 14, 12, 9, 8, 6]
[15, 14, 12, 9, 8, 1]
[15, 14, 12, 9, 7, 5]
[15, 14, 12, 9, 5, 3]
[15, 14, 12, 9, 5, 1]
[15, 14, 12, 9, 4, 2]
[15, 14, 12, 8, 7, 6]
[15, 14, 12, 8, 6, 4]
[15, 14, 12, 8, 5, 2]
[15, 14, 12, 8, 3, 1]
[15, 14, 12, 7, 6, 5]
[15, 14, 12, 7, 6, 4]
[15, 14, 12, 7, 6, 2]
[15, 14, 12, 7, 5, 4]
[15, 14, 12, 7, 5, 1]
[15, 14, 12, 7, 4, 3]
[15, 14, 12, 7, 4, 2]
[15, 14, 12, 7, 3, 2]
[15, 14, 12, 6, 5, 4]
[15, 14, 12, 6, 3, 2]
[15, 14, 11, 10, 9, 1]
[15, 14, 11, 10, 7, 6]
[15, 14, 11, 10, 7, 5]
[15, 14, 11, 10, 7, 2]
[15, 14, 11, 10, 7, 1]
[15, 14, 11, 10, 6, 3]
[15, 14, 11, 10, 5, 1]
[15, 14, 11, 10, 4, 2]
[15, 14, 11, 9, 6, 3]
[15, 14, 11, 9, 5, 3]
[15, 14, 11, 9, 5, 2]
[15, 14, 11, 8, 7, 1]
[15, 14, 11, 8, 5, 4]
[15, 14, 11, 8, 5, 3]
[15, 14, 11, 8, 5, 1]
[15, 14, 11, 8, 4, 2]
[15, 14, 11, 8, 3, 2]
[15, 14, 11, 7, 6, 3]
[15, 14, 11, 7, 4, 2]
[15, 14, 11, 6, 5, 3]
[15, 14, 11, 6, 5, 2]
[15, 14, 11, 6, 3, 2]
[15, 14, 10, 9, 8, 1]
[15, 14, 10, 9, 7, 6]
[15, 14, 10, 9, 6, 4]
[15, 14, 10, 9, 6, 2]
[15, 14, 10, 9, 5, 4]
[15, 14, 10, 8, 7, 5]
[15, 14, 10, 8, 7, 3]
[15, 14, 10, 8, 6, 3]
[15, 14, 10, 8, 5, 4]
[15, 14, 10, 8, 4, 2]
[15, 14, 10, 7, 6, 2]
[15, 14, 10, 7, 5, 2]
[15, 14, 9, 8, 7, 1]
[15, 14, 9, 8, 6, 5]
[15, 14, 9, 8, 5, 2]
[15, 14, 9, 8, 3, 2]
[15, 14, 9, 7, 6, 4]
[15, 14, 9, 7, 5, 4]
[15, 14, 9, 7, 4, 3]
[15, 14, 9, 6, 5, 3]
[15, 14, 9, 6, 4, 2]
[15, 14, 9, 6, 3, 2]
[15, 14, 9, 5, 3, 2]
[15, 14, 8, 7, 6, 3]
[15, 14, 8, 7, 5, 2]
[15, 14, 7, 6, 4, 2]
[15, 14, 7, 5, 4, 3]
[15, 14, 7, 4, 3, 2]
[15, 14, 6, 5, 4, 3]
[15, 13, 12, 11, 10, 3]
[15, 13, 12, 11, 9, 8]
[15, 13, 12, 11, 9, 7]
[15, 13, 12, 11, 9, 4]
[15, 13, 12, 11, 9, 2]
[15, 13, 12, 11, 7, 5]
[15, 13, 12, 11, 7, 3]
[15, 13, 12, 11, 7, 2]
[15, 13, 12, 11, 6, 5]
[15, 13, 12, 10, 9, 7]
[15, 13, 12, 10, 9, 5]
[15, 13, 12, 10, 9, 3]
[15, 13, 12, 10, 9, 2]
[15, 13, 12, 10, 8, 3]
[15, 13, 12, 10, 3, 2]
[15, 13, 12, 9, 8, 7]
[15, 13, 12, 9, 8, 2]
[15, 13, 12, 9, 7, 6]
[15, 13, 12, 9, 7, 3]
[15, 13, 12, 9, 6, 3]
[15, 13, 12, 9, 4, 2]
[15, 13, 12, 8, 7, 5]
[15, 13, 12, 7, 6, 5]
[15, 13, 12, 7, 6, 4]
[15, 13, 12, 7, 6, 2]
[15, 13, 12, 6, 4, 2]
[15, 13, 12, 5, 4, 2]
[15, 13, 11, 10, 9, 8]
[15, 13, 11, 10, 9, 3]
[15, 13, 11, 10, 8, 5]
[15, 13, 11, 10, 8, 4]
[15, 13, 11, 10, 8, 2]
[15, 13, 11, 10, 7, 2]
[15, 13, 11, 10, 5, 3]
[15, 13, 11, 9, 6, 5]
[15, 13, 11, 9, 6, 4]
[15, 13, 11, 9, 5, 4]
[15, 13, 11, 9, 4, 2]
[15, 13, 11, 8, 6, 3]
[15, 13, 11, 8, 4, 3]
[15, 13, 11, 7, 6, 5]
[15, 13, 11, 7, 5, 3]
[15, 13, 11, 6, 5, 3]
[15, 13, 11, 5, 4, 3]
[15, 13, 10, 9, 7, 4]
[15, 13, 10, 9, 6, 5]
[15, 13, 10, 9, 6, 4]
[15, 13, 10, 8, 5, 3]
[15, 13, 10, 8, 5, 2]
[15, 13, 10, 7, 5, 4]
[15, 13, 10, 7, 4, 3]
[15, 13, 10, 6, 4, 3]
[15, 13, 9, 8, 7, 6]
[15, 13, 9, 8, 7, 5]
[15, 13, 9, 8, 7, 2]
[15, 13, 9, 8, 6, 2]
[15, 13, 9, 8, 4, 3]
[15, 13, 9, 7, 6, 3]
[15, 13, 9, 7, 5, 3]
[15, 13, 9, 7, 4, 3]
[15, 13, 8, 7, 6, 5]
[15, 13, 8, 7, 5, 4]
[15, 13, 8, 5, 4, 3]
[15, 12, 11, 10, 9, 5]
[15, 12, 11, 10, 9, 4]
[15, 12, 11, 10, 8, 7]
[15, 12, 11, 10, 6, 4]
[15, 12, 11, 9, 8, 6]
[15, 12, 11, 9, 8, 4]
[15, 12, 11, 9, 6, 5]
[15, 12, 11, 8, 7, 6]
[15, 12, 11, 8, 7, 4]
[15, 12, 11, 8, 7, 3]
[15, 12, 11, 8, 5, 3]
[15, 12, 11, 8, 4, 3]
[15, 12, 10, 9, 7, 6]
[15, 12, 10, 9, 5, 4]
[15, 12, 10, 8, 7, 3]
[15, 12, 10, 8, 6, 5]
[15, 12, 10, 8, 5, 4]
[15, 12, 10, 8, 5, 3]
[15, 12, 10, 7, 6, 5]
[15, 12, 9, 8, 7, 5]
[15, 12, 9, 8, 6, 3]
[15, 12, 9, 8, 5, 4]
[15, 12, 8, 7, 6, 5]
[15, 12, 8, 7, 5, 4]
[15, 11, 10, 9, 7, 6]
[15, 11, 10, 9, 7, 5]
[15, 11, 10, 9, 6, 4]
[15, 11, 10, 8, 7, 5]
[15, 11, 10, 8, 6, 4]
[15, 11, 10, 7, 6, 5]
[15, 11, 9, 8, 7, 6]
[15, 11, 9, 8, 7, 4]


15 stages, 8 taps:  (360 sets)

[15, 14, 13, 12, 11, 10, 9, 6]
[15, 14, 13, 12, 11, 10, 7, 1]
[15, 14, 13, 12, 11, 10, 6, 3]
[15, 14, 13, 12, 11, 10, 3, 2]
[15, 14, 13, 12, 11, 10, 3, 1]
[15, 14, 13, 12, 11, 9, 8, 7]
[15, 14, 13, 12, 11, 9, 8, 5]
[15, 14, 13, 12, 11, 9, 8, 2]
[15, 14, 13, 12, 11, 9, 7, 6]
[15, 14, 13, 12, 11, 9, 7, 5]
[15, 14, 13, 12, 11, 9, 7, 1]
[15, 14, 13, 12, 11, 9, 5, 1]
[15, 14, 13, 12, 11, 9, 4, 1]
[15, 14, 13, 12, 11, 9, 2, 1]
[15, 14, 13, 12, 11, 8, 7, 2]
[15, 14, 13, 12, 11, 8, 6, 4]
[15, 14, 13, 12, 11, 8, 5, 1]
[15, 14, 13, 12, 11, 8, 4, 2]
[15, 14, 13, 12, 11, 7, 4, 1]
[15, 14, 13, 12, 11, 6, 5, 4]
[15, 14, 13, 12, 11, 5, 2, 1]
[15, 14, 13, 12, 11, 3, 2, 1]
[15, 14, 13, 12, 10, 9, 7, 2]
[15, 14, 13, 12, 10, 9, 6, 2]
[15, 14, 13, 12, 10, 9, 5, 1]
[15, 14, 13, 12, 10, 8, 7, 6]
[15, 14, 13, 12, 10, 8, 7, 4]
[15, 14, 13, 12, 10, 8, 6, 5]
[15, 14, 13, 12, 10, 8, 6, 4]
[15, 14, 13, 12, 10, 8, 5, 2]
[15, 14, 13, 12, 10, 8, 4, 3]
[15, 14, 13, 12, 10, 8, 3, 2]
[15, 14, 13, 12, 10, 7, 5, 1]
[15, 14, 13, 12, 10, 7, 4, 3]
[15, 14, 13, 12, 10, 7, 3, 1]
[15, 14, 13, 12, 10, 6, 5, 2]
[15, 14, 13, 12, 10, 6, 4, 2]
[15, 14, 13, 12, 10, 6, 4, 1]
[15, 14, 13, 12, 10, 5, 4, 3]
[15, 14, 13, 12, 10, 4, 2, 1]
[15, 14, 13, 12, 10, 3, 2, 1]
[15, 14, 13, 12, 9, 8, 7, 4]
[15, 14, 13, 12, 9, 8, 7, 3]
[15, 14, 13, 12, 9, 8, 7, 2]
[15, 14, 13, 12, 9, 8, 4, 2]
[15, 14, 13, 12, 9, 8, 3, 1]
[15, 14, 13, 12, 9, 7, 5, 2]
[15, 14, 13, 12, 9, 7, 2, 1]
[15, 14, 13, 12, 9, 6, 4, 3]
[15, 14, 13, 12, 9, 6, 4, 2]
[15, 14, 13, 12, 9, 6, 3, 2]
[15, 14, 13, 12, 9, 6, 2, 1]
[15, 14, 13, 12, 9, 4, 3, 2]
[15, 14, 13, 12, 8, 7, 6, 5]
[15, 14, 13, 12, 8, 7, 6, 2]
[15, 14, 13, 12, 8, 7, 3, 2]
[15, 14, 13, 12, 8, 6, 5, 4]
[15, 14, 13, 12, 8, 6, 5, 1]
[15, 14, 13, 12, 8, 6, 4, 1]
[15, 14, 13, 12, 8, 6, 3, 1]
[15, 14, 13, 12, 8, 5, 4, 2]
[15, 14, 13, 12, 8, 4, 3, 1]
[15, 14, 13, 12, 7, 6, 5, 4]
[15, 14, 13, 12, 7, 6, 4, 2]
[15, 14, 13, 12, 7, 6, 2, 1]
[15, 14, 13, 12, 7, 5, 3, 1]
[15, 14, 13, 12, 7, 4, 2, 1]
[15, 14, 13, 11, 10, 9, 8, 5]
[15, 14, 13, 11, 10, 9, 7, 1]
[15, 14, 13, 11, 10, 9, 3, 2]
[15, 14, 13, 11, 10, 9, 3, 1]
[15, 14, 13, 11, 10, 8, 6, 5]
[15, 14, 13, 11, 10, 8, 6, 3]
[15, 14, 13, 11, 10, 8, 5, 1]
[15, 14, 13, 11, 10, 8, 4, 2]
[15, 14, 13, 11, 10, 8, 2, 1]
[15, 14, 13, 11, 10, 7, 4, 3]
[15, 14, 13, 11, 10, 7, 4, 1]
[15, 14, 13, 11, 10, 6, 5, 3]
[15, 14, 13, 11, 10, 6, 5, 2]
[15, 14, 13, 11, 10, 6, 3, 1]
[15, 14, 13, 11, 10, 5, 4, 2]
[15, 14, 13, 11, 9, 8, 6, 2]
[15, 14, 13, 11, 9, 8, 5, 3]
[15, 14, 13, 11, 9, 8, 4, 3]
[15, 14, 13, 11, 9, 8, 3, 1]
[15, 14, 13, 11, 9, 8, 2, 1]
[15, 14, 13, 11, 9, 7, 6, 3]
[15, 14, 13, 11, 9, 7, 6, 1]
[15, 14, 13, 11, 9, 7, 3, 2]
[15, 14, 13, 11, 9, 6, 5, 4]
[15, 14, 13, 11, 9, 6, 4, 3]
[15, 14, 13, 11, 9, 6, 3, 1]
[15, 14, 13, 11, 9, 5, 3, 2]
[15, 14, 13, 11, 9, 4, 3, 1]
[15, 14, 13, 11, 8, 7, 6, 2]
[15, 14, 13, 11, 8, 7, 3, 2]
[15, 14, 13, 11, 8, 6, 5, 4]
[15, 14, 13, 11, 8, 6, 5, 3]
[15, 14, 13, 11, 8, 6, 5, 1]
[15, 14, 13, 11, 8, 6, 4, 3]
[15, 14, 13, 11, 8, 5, 4, 2]
[15, 14, 13, 11, 8, 5, 3, 1]
[15, 14, 13, 11, 8, 5, 2, 1]
[15, 14, 13, 11, 7, 6, 4, 1]
[15, 14, 13, 11, 7, 6, 3, 2]
[15, 14, 13, 11, 7, 6, 3, 1]
[15, 14, 13, 11, 7, 5, 2, 1]
[15, 14, 13, 11, 6, 5, 4, 3]
[15, 14, 13, 11, 6, 5, 3, 2]
[15, 14, 13, 11, 6, 4, 3, 1]
[15, 14, 13, 10, 9, 8, 7, 1]
[15, 14, 13, 10, 9, 8, 5, 3]
[15, 14, 13, 10, 9, 7, 2, 1]
[15, 14, 13, 10, 9, 6, 5, 3]
[15, 14, 13, 10, 9, 6, 4, 1]
[15, 14, 13, 10, 9, 6, 2, 1]
[15, 14, 13, 10, 9, 5, 4, 3]
[15, 14, 13, 10, 8, 7, 5, 2]
[15, 14, 13, 10, 8, 7, 4, 2]
[15, 14, 13, 10, 8, 5, 4, 1]
[15, 14, 13, 10, 8, 5, 3, 2]
[15, 14, 13, 10, 8, 4, 3, 1]
[15, 14, 13, 10, 7, 6, 5, 4]
[15, 14, 13, 10, 7, 6, 3, 2]
[15, 14, 13, 10, 7, 6, 3, 1]
[15, 14, 13, 10, 7, 5, 3, 1]
[15, 14, 13, 10, 7, 4, 3, 2]
[15, 14, 13, 10, 6, 5, 4, 1]
[15, 14, 13, 10, 6, 5, 3, 2]
[15, 14, 13, 10, 6, 5, 3, 1]
[15, 14, 13, 10, 6, 4, 3, 1]
[15, 14, 13, 9, 8, 7, 6, 1]
[15, 14, 13, 9, 8, 7, 4, 1]
[15, 14, 13, 9, 8, 7, 3, 2]
[15, 14, 13, 9, 8, 6, 5, 2]
[15, 14, 13, 9, 8, 6, 5, 1]
[15, 14, 13, 9, 8, 6, 4, 3]
[15, 14, 13, 9, 8, 5, 4, 2]
[15, 14, 13, 9, 7, 6, 4, 2]
[15, 14, 13, 9, 7, 5, 3, 2]
[15, 14, 13, 9, 7, 5, 3, 1]
[15, 14, 13, 9, 7, 4, 3, 2]
[15, 14, 13, 9, 7, 4, 3, 1]
[15, 14, 13, 9, 6, 5, 4, 3]
[15, 14, 13, 8, 7, 6, 4, 1]
[15, 14, 13, 8, 7, 5, 4, 1]
[15, 14, 13, 8, 6, 4, 3, 2]
[15, 14, 13, 6, 5, 4, 3, 1]
[15, 14, 12, 11, 10, 9, 8, 2]
[15, 14, 12, 11, 10, 9, 8, 1]
[15, 14, 12, 11, 10, 9, 7, 5]
[15, 14, 12, 11, 10, 9, 7, 3]
[15, 14, 12, 11, 10, 9, 7, 2]
[15, 14, 12, 11, 10, 9, 7, 1]
[15, 14, 12, 11, 10, 9, 6, 4]
[15, 14, 12, 11, 10, 9, 6, 3]
[15, 14, 12, 11, 10, 8, 5, 4]
[15, 14, 12, 11, 10, 8, 5, 3]
[15, 14, 12, 11, 10, 8, 4, 3]
[15, 14, 12, 11, 10, 7, 6, 4]
[15, 14, 12, 11, 10, 7, 4, 1]
[15, 14, 12, 11, 10, 6, 5, 4]
[15, 14, 12, 11, 10, 5, 4, 3]
[15, 14, 12, 11, 10, 5, 3, 1]
[15, 14, 12, 11, 9, 8, 7, 5]
[15, 14, 12, 11, 9, 8, 7, 1]
[15, 14, 12, 11, 9, 8, 6, 5]
[15, 14, 12, 11, 9, 8, 6, 2]
[15, 14, 12, 11, 9, 8, 5, 3]
[15, 14, 12, 11, 9, 8, 5, 2]
[15, 14, 12, 11, 9, 7, 6, 1]
[15, 14, 12, 11, 9, 7, 5, 4]
[15, 14, 12, 11, 9, 7, 5, 1]
[15, 14, 12, 11, 9, 7, 4, 1]
[15, 14, 12, 11, 9, 7, 3, 1]
[15, 14, 12, 11, 9, 6, 4, 3]
[15, 14, 12, 11, 9, 5, 4, 2]
[15, 14, 12, 11, 8, 7, 6, 1]
[15, 14, 12, 11, 8, 7, 5, 4]
[15, 14, 12, 11, 8, 7, 5, 3]
[15, 14, 12, 11, 8, 7, 5, 1]
[15, 14, 12, 11, 8, 7, 4, 3]
[15, 14, 12, 11, 8, 7, 3, 1]
[15, 14, 12, 11, 8, 6, 5, 4]
[15, 14, 12, 11, 8, 6, 5, 2]
[15, 14, 12, 11, 8, 6, 3, 2]
[15, 14, 12, 11, 8, 5, 4, 1]
[15, 14, 12, 11, 8, 4, 3, 1]
[15, 14, 12, 11, 7, 6, 5, 2]
[15, 14, 12, 11, 7, 6, 4, 3]
[15, 14, 12, 11, 7, 6, 4, 1]
[15, 14, 12, 11, 7, 5, 4, 2]
[15, 14, 12, 11, 6, 5, 3, 2]
[15, 14, 12, 10, 9, 8, 5, 1]
[15, 14, 12, 10, 9, 7, 6, 5]
[15, 14, 12, 10, 9, 7, 6, 2]
[15, 14, 12, 10, 9, 7, 5, 3]
[15, 14, 12, 10, 9, 6, 5, 1]
[15, 14, 12, 10, 9, 6, 3, 1]
[15, 14, 12, 10, 9, 5, 3, 1]
[15, 14, 12, 10, 8, 7, 6, 5]
[15, 14, 12, 10, 8, 6, 5, 1]
[15, 14, 12, 10, 8, 6, 4, 3]
[15, 14, 12, 10, 8, 5, 3, 1]
[15, 14, 12, 10, 7, 6, 5, 4]
[15, 14, 12, 10, 7, 6, 5, 3]
[15, 14, 12, 10, 7, 6, 5, 2]
[15, 14, 12, 10, 7, 6, 4, 1]
[15, 14, 12, 10, 7, 5, 4, 1]
[15, 14, 12, 10, 7, 4, 3, 2]
[15, 14, 12, 9, 8, 7, 6, 4]
[15, 14, 12, 9, 8, 7, 6, 3]
[15, 14, 12, 9, 8, 7, 5, 4]
[15, 14, 12, 9, 8, 7, 4, 3]
[15, 14, 12, 9, 8, 7, 4, 1]
[15, 14, 12, 9, 8, 6, 5, 3]
[15, 14, 12, 9, 6, 5, 3, 2]
[15, 14, 12, 8, 7, 6, 4, 3]
[15, 14, 12, 8, 7, 6, 4, 2]
[15, 14, 12, 8, 7, 5, 4, 3]
[15, 14, 12, 8, 6, 5, 3, 2]
[15, 14, 12, 8, 5, 4, 3, 2]
[15, 14, 12, 7, 6, 5, 4, 3]
[15, 14, 11, 10, 9, 8, 7, 5]
[15, 14, 11, 10, 9, 8, 3, 2]
[15, 14, 11, 10, 9, 7, 6, 4]
[15, 14, 11, 10, 9, 7, 6, 3]
[15, 14, 11, 10, 9, 7, 6, 2]
[15, 14, 11, 10, 9, 7, 6, 1]
[15, 14, 11, 10, 9, 6, 5, 4]
[15, 14, 11, 10, 9, 6, 5, 2]
[15, 14, 11, 10, 9, 5, 4, 2]
[15, 14, 11, 10, 8, 7, 6, 5]
[15, 14, 11, 10, 8, 7, 6, 2]
[15, 14, 11, 10, 8, 7, 5, 1]
[15, 14, 11, 10, 8, 5, 4, 1]
[15, 14, 11, 10, 7, 6, 4, 3]
[15, 14, 11, 10, 6, 5, 3, 2]
[15, 14, 11, 10, 5, 4, 3, 2]
[15, 14, 11, 9, 8, 6, 5, 4]
[15, 14, 11, 9, 8, 6, 4, 2]
[15, 14, 11, 9, 8, 4, 3, 2]
[15, 14, 11, 9, 7, 6, 5, 1]
[15, 14, 11, 9, 7, 6, 4, 3]
[15, 14, 11, 9, 7, 5, 3, 2]
[15, 14, 11, 8, 7, 6, 4, 3]
[15, 14, 11, 8, 7, 6, 3, 2]
[15, 14, 11, 8, 6, 4, 3, 2]
[15, 14, 11, 7, 6, 5, 4, 3]
[15, 14, 11, 7, 6, 5, 4, 2]
[15, 14, 11, 7, 5, 4, 3, 2]
[15, 14, 10, 9, 8, 7, 6, 1]
[15, 14, 10, 9, 8, 7, 4, 3]
[15, 14, 10, 9, 8, 6, 4, 3]
[15, 14, 10, 9, 7, 6, 5, 3]
[15, 14, 10, 9, 7, 6, 4, 2]
[15, 14, 10, 9, 7, 5, 4, 3]
[15, 14, 10, 9, 6, 5, 4, 3]
[15, 14, 10, 9, 6, 5, 4, 2]
[15, 14, 10, 8, 7, 6, 5, 3]
[15, 14, 10, 8, 7, 5, 4, 2]
[15, 14, 10, 8, 6, 5, 4, 3]
[15, 14, 10, 8, 6, 5, 4, 2]
[15, 14, 10, 7, 6, 5, 4, 3]
[15, 14, 10, 7, 6, 4, 3, 2]
[15, 14, 10, 6, 5, 4, 3, 2]
[15, 14, 9, 8, 7, 5, 3, 2]
[15, 14, 9, 8, 7, 4, 3, 2]
[15, 14, 9, 8, 5, 4, 3, 2]
[15, 14, 9, 7, 6, 5, 4, 2]
[15, 14, 9, 7, 6, 4, 3, 2]
[15, 14, 8, 7, 6, 5, 3, 2]
[15, 14, 8, 7, 5, 4, 3, 2]
[15, 14, 8, 6, 5, 4, 3, 2]
[15, 13, 12, 11, 10, 9, 8, 7]
[15, 13, 12, 11, 10, 9, 8, 5]
[15, 13, 12, 11, 10, 9, 6, 5]
[15, 13, 12, 11, 10, 9, 5, 3]
[15, 13, 12, 11, 10, 9, 4, 2]
[15, 13, 12, 11, 10, 8, 7, 6]
[15, 13, 12, 11, 10, 8, 7, 3]
[15, 13, 12, 11, 10, 8, 5, 2]
[15, 13, 12, 11, 10, 7, 5, 3]
[15, 13, 12, 11, 10, 7, 3, 2]
[15, 13, 12, 11, 10, 6, 5, 3]
[15, 13, 12, 11, 9, 8, 7, 4]
[15, 13, 12, 11, 9, 8, 6, 4]
[15, 13, 12, 11, 9, 8, 6, 3]
[15, 13, 12, 11, 9, 8, 4, 3]
[15, 13, 12, 11, 9, 8, 4, 2]
[15, 13, 12, 11, 9, 7, 3, 2]
[15, 13, 12, 11, 9, 6, 4, 3]
[15, 13, 12, 11, 9, 5, 4, 3]
[15, 13, 12, 11, 8, 7, 6, 4]
[15, 13, 12, 11, 8, 7, 6, 3]
[15, 13, 12, 11, 8, 7, 3, 2]
[15, 13, 12, 11, 8, 6, 5, 2]
[15, 13, 12, 11, 8, 6, 4, 3]
[15, 13, 12, 11, 8, 6, 4, 2]
[15, 13, 12, 11, 8, 4, 3, 2]
[15, 13, 12, 11, 7, 6, 4, 2]
[15, 13, 12, 11, 7, 5, 3, 2]
[15, 13, 12, 11, 6, 5, 4, 2]
[15, 13, 12, 10, 9, 8, 7, 5]
[15, 13, 12, 10, 9, 8, 7, 4]
[15, 13, 12, 10, 9, 8, 6, 2]
[15, 13, 12, 10, 9, 8, 5, 2]
[15, 13, 12, 10, 9, 7, 6, 4]
[15, 13, 12, 10, 9, 7, 4, 3]
[15, 13, 12, 10, 9, 6, 4, 3]
[15, 13, 12, 10, 9, 5, 4, 2]
[15, 13, 12, 10, 9, 5, 3, 2]
[15, 13, 12, 10, 8, 7, 6, 5]
[15, 13, 12, 10, 8, 7, 5, 3]
[15, 13, 12, 10, 8, 7, 4, 2]
[15, 13, 12, 10, 8, 6, 5, 3]
[15, 13, 12, 10, 8, 6, 4, 2]
[15, 13, 12, 10, 6, 5, 4, 2]
[15, 13, 12, 9, 8, 7, 6, 2]
[15, 13, 12, 9, 8, 7, 5, 4]
[15, 13, 12, 9, 8, 7, 5, 2]
[15, 13, 12, 9, 7, 6, 5, 3]
[15, 13, 12, 8, 7, 6, 5, 2]
[15, 13, 12, 8, 6, 5, 4, 2]
[15, 13, 11, 10, 9, 8, 6, 3]
[15, 13, 11, 10, 9, 8, 5, 3]
[15, 13, 11, 10, 9, 7, 4, 2]
[15, 13, 11, 10, 9, 6, 5, 4]
[15, 13, 11, 10, 9, 5, 4, 3]
[15, 13, 11, 10, 8, 7, 6, 3]
[15, 13, 11, 10, 7, 6, 5, 3]
[15, 13, 11, 10, 7, 6, 4, 2]
[15, 13, 11, 9, 8, 7, 6, 4]
[15, 13, 11, 9, 8, 7, 6, 2]
[15, 13, 11, 9, 8, 7, 4, 3]
[15, 13, 11, 9, 8, 5, 4, 3]
[15, 13, 11, 9, 7, 5, 4, 3]
[15, 13, 11, 9, 6, 5, 4, 3]
[15, 13, 11, 8, 7, 6, 5, 3]
[15, 13, 10, 9, 8, 7, 6, 4]
[15, 13, 10, 9, 8, 7, 5, 4]
[15, 13, 10, 9, 8, 6, 5, 4]
[15, 13, 10, 9, 8, 5, 4, 3]
[15, 13, 10, 9, 7, 6, 5, 4]
[15, 13, 10, 8, 7, 6, 5, 4]
[15, 13, 10, 8, 7, 6, 5, 3]
[15, 13, 10, 8, 7, 5, 4, 3]
[15, 12, 11, 10, 9, 8, 6, 3]
[15, 12, 11, 10, 9, 6, 5, 3]
[15, 12, 11, 10, 9, 6, 4, 3]
[15, 12, 11, 10, 9, 5, 4, 3]
[15, 12, 11, 10, 8, 7, 4, 3]
[15, 12, 11, 10, 8, 6, 4, 3]
[15, 12, 11, 10, 7, 6, 5, 4]
[15, 12, 10, 9, 8, 7, 5, 4]
[15, 12, 10, 9, 8, 7, 5, 3]
[15, 12, 9, 8, 7, 6, 5, 4]
[15, 11, 10, 9, 8, 7, 6, 5]
[15, 11, 10, 9, 8, 7, 6, 4]


15 stages, 10 taps:  (225 sets)

[15, 14, 13, 12, 11, 10, 9, 8, 7, 4]
[15, 14, 13, 12, 11, 10, 9, 8, 6, 5]
[15, 14, 13, 12, 11, 10, 9, 8, 5, 3]
[15, 14, 13, 12, 11, 10, 9, 8, 5, 1]
[15, 14, 13, 12, 11, 10, 9, 8, 4, 1]
[15, 14, 13, 12, 11, 10, 9, 7, 6, 3]
[15, 14, 13, 12, 11, 10, 9, 7, 5, 4]
[15, 14, 13, 12, 11, 10, 9, 7, 4, 3]
[15, 14, 13, 12, 11, 10, 9, 7, 2, 1]
[15, 14, 13, 12, 11, 10, 9, 6, 4, 3]
[15, 14, 13, 12, 11, 10, 9, 6, 3, 2]
[15, 14, 13, 12, 11, 10, 9, 5, 4, 1]
[15, 14, 13, 12, 11, 10, 9, 5, 3, 2]
[15, 14, 13, 12, 11, 10, 8, 7, 6, 5]
[15, 14, 13, 12, 11, 10, 8, 7, 5, 4]
[15, 14, 13, 12, 11, 10, 8, 7, 5, 1]
[15, 14, 13, 12, 11, 10, 8, 7, 4, 3]
[15, 14, 13, 12, 11, 10, 8, 7, 3, 1]
[15, 14, 13, 12, 11, 10, 8, 6, 5, 4]
[15, 14, 13, 12, 11, 10, 8, 6, 4, 1]
[15, 14, 13, 12, 11, 10, 8, 6, 2, 1]
[15, 14, 13, 12, 11, 10, 8, 5, 4, 3]
[15, 14, 13, 12, 11, 10, 8, 5, 3, 2]
[15, 14, 13, 12, 11, 10, 8, 5, 3, 1]
[15, 14, 13, 12, 11, 10, 8, 4, 3, 2]
[15, 14, 13, 12, 11, 10, 8, 4, 2, 1]
[15, 14, 13, 12, 11, 10, 8, 3, 2, 1]
[15, 14, 13, 12, 11, 10, 7, 6, 4, 1]
[15, 14, 13, 12, 11, 10, 7, 5, 3, 2]
[15, 14, 13, 12, 11, 10, 6, 5, 4, 2]
[15, 14, 13, 12, 11, 10, 6, 5, 2, 1]
[15, 14, 13, 12, 11, 10, 6, 4, 3, 1]
[15, 14, 13, 12, 11, 10, 4, 3, 2, 1]
[15, 14, 13, 12, 11, 9, 8, 7, 6, 5]
[15, 14, 13, 12, 11, 9, 8, 7, 6, 3]
[15, 14, 13, 12, 11, 9, 8, 7, 5, 3]
[15, 14, 13, 12, 11, 9, 8, 7, 5, 1]
[15, 14, 13, 12, 11, 9, 8, 7, 3, 2]
[15, 14, 13, 12, 11, 9, 8, 6, 5, 3]
[15, 14, 13, 12, 11, 9, 8, 6, 3, 2]
[15, 14, 13, 12, 11, 9, 8, 5, 4, 2]
[15, 14, 13, 12, 11, 9, 8, 3, 2, 1]
[15, 14, 13, 12, 11, 9, 7, 6, 5, 2]
[15, 14, 13, 12, 11, 9, 7, 6, 4, 3]
[15, 14, 13, 12, 11, 9, 7, 6, 3, 1]
[15, 14, 13, 12, 11, 9, 7, 4, 3, 1]
[15, 14, 13, 12, 11, 9, 7, 4, 2, 1]
[15, 14, 13, 12, 11, 9, 6, 5, 4, 2]
[15, 14, 13, 12, 11, 8, 7, 6, 5, 3]
[15, 14, 13, 12, 11, 8, 7, 6, 5, 1]
[15, 14, 13, 12, 11, 8, 7, 6, 2, 1]
[15, 14, 13, 12, 11, 8, 7, 5, 4, 3]
[15, 14, 13, 12, 11, 8, 7, 5, 4, 1]
[15, 14, 13, 12, 11, 8, 7, 4, 3, 1]
[15, 14, 13, 12, 11, 8, 6, 5, 4, 3]
[15, 14, 13, 12, 11, 8, 6, 5, 4, 1]
[15, 14, 13, 12, 11, 8, 6, 3, 2, 1]
[15, 14, 13, 12, 11, 8, 5, 4, 3, 2]
[15, 14, 13, 12, 11, 8, 5, 4, 3, 1]
[15, 14, 13, 12, 11, 7, 6, 5, 4, 2]
[15, 14, 13, 12, 11, 7, 6, 5, 4, 1]
[15, 14, 13, 12, 11, 7, 6, 5, 3, 2]
[15, 14, 13, 12, 11, 7, 6, 4, 3, 1]
[15, 14, 13, 12, 11, 6, 5, 4, 2, 1]
[15, 14, 13, 12, 11, 6, 5, 3, 2, 1]
[15, 14, 13, 12, 10, 9, 8, 7, 6, 3]
[15, 14, 13, 12, 10, 9, 8, 7, 6, 1]
[15, 14, 13, 12, 10, 9, 8, 7, 5, 4]
[15, 14, 13, 12, 10, 9, 8, 7, 5, 1]
[15, 14, 13, 12, 10, 9, 8, 7, 4, 2]
[15, 14, 13, 12, 10, 9, 8, 7, 3, 1]
[15, 14, 13, 12, 10, 9, 8, 7, 2, 1]
[15, 14, 13, 12, 10, 9, 8, 6, 4, 1]
[15, 14, 13, 12, 10, 9, 8, 6, 3, 2]
[15, 14, 13, 12, 10, 9, 8, 5, 3, 2]
[15, 14, 13, 12, 10, 9, 7, 6, 4, 3]
[15, 14, 13, 12, 10, 9, 7, 5, 4, 2]
[15, 14, 13, 12, 10, 9, 6, 3, 2, 1]
[15, 14, 13, 12, 10, 9, 5, 4, 3, 1]
[15, 14, 13, 12, 10, 8, 7, 6, 2, 1]
[15, 14, 13, 12, 10, 8, 7, 5, 4, 2]
[15, 14, 13, 12, 10, 8, 7, 4, 3, 2]
[15, 14, 13, 12, 10, 8, 6, 5, 3, 2]
[15, 14, 13, 12, 10, 8, 5, 4, 3, 1]
[15, 14, 13, 12, 10, 7, 6, 5, 4, 3]
[15, 14, 13, 12, 10, 7, 6, 5, 4, 2]
[15, 14, 13, 12, 10, 7, 6, 5, 4, 1]
[15, 14, 13, 12, 10, 7, 6, 3, 2, 1]
[15, 14, 13, 12, 10, 7, 5, 4, 3, 2]
[15, 14, 13, 12, 10, 6, 5, 4, 3, 1]
[15, 14, 13, 12, 9, 8, 7, 6, 5, 2]
[15, 14, 13, 12, 9, 8, 7, 5, 4, 1]
[15, 14, 13, 12, 9, 8, 7, 4, 2, 1]
[15, 14, 13, 12, 9, 8, 5, 4, 2, 1]
[15, 14, 13, 12, 9, 7, 6, 5, 4, 3]
[15, 14, 13, 12, 9, 7, 6, 4, 3, 1]
[15, 14, 13, 12, 9, 6, 5, 4, 3, 1]
[15, 14, 13, 12, 8, 7, 6, 5, 4, 2]
[15, 14, 13, 12, 8, 7, 6, 5, 4, 1]
[15, 14, 13, 12, 8, 7, 6, 5, 2, 1]
[15, 14, 13, 12, 7, 6, 5, 4, 2, 1]
[15, 14, 13, 11, 10, 9, 8, 7, 4, 2]
[15, 14, 13, 11, 10, 9, 8, 6, 3, 2]
[15, 14, 13, 11, 10, 9, 8, 5, 4, 3]
[15, 14, 13, 11, 10, 9, 8, 5, 4, 1]
[15, 14, 13, 11, 10, 9, 8, 5, 3, 2]
[15, 14, 13, 11, 10, 9, 7, 6, 5, 4]
[15, 14, 13, 11, 10, 9, 7, 6, 5, 1]
[15, 14, 13, 11, 10, 9, 7, 6, 4, 3]
[15, 14, 13, 11, 10, 9, 7, 6, 3, 1]
[15, 14, 13, 11, 10, 9, 7, 6, 2, 1]
[15, 14, 13, 11, 10, 9, 7, 5, 3, 2]
[15, 14, 13, 11, 10, 9, 7, 4, 3, 2]
[15, 14, 13, 11, 10, 9, 6, 5, 4, 2]
[15, 14, 13, 11, 10, 8, 7, 6, 4, 3]
[15, 14, 13, 11, 10, 8, 7, 6, 3, 2]
[15, 14, 13, 11, 10, 8, 7, 6, 2, 1]
[15, 14, 13, 11, 10, 8, 7, 5, 3, 1]
[15, 14, 13, 11, 10, 8, 7, 4, 2, 1]
[15, 14, 13, 11, 10, 8, 6, 5, 3, 1]
[15, 14, 13, 11, 10, 8, 6, 4, 3, 2]
[15, 14, 13, 11, 10, 8, 5, 4, 2, 1]
[15, 14, 13, 11, 10, 6, 5, 4, 3, 2]
[15, 14, 13, 11, 9, 8, 7, 6, 5, 1]
[15, 14, 13, 11, 9, 8, 7, 6, 4, 2]
[15, 14, 13, 11, 9, 8, 7, 6, 3, 2]
[15, 14, 13, 11, 9, 8, 7, 5, 4, 1]
[15, 14, 13, 11, 9, 8, 7, 5, 3, 2]
[15, 14, 13, 11, 9, 8, 7, 4, 3, 1]
[15, 14, 13, 11, 9, 8, 7, 4, 2, 1]
[15, 14, 13, 11, 9, 8, 6, 5, 4, 2]
[15, 14, 13, 11, 9, 8, 6, 5, 4, 1]
[15, 14, 13, 11, 9, 8, 6, 5, 3, 1]
[15, 14, 13, 11, 9, 8, 6, 5, 2, 1]
[15, 14, 13, 11, 9, 8, 6, 4, 3, 2]
[15, 14, 13, 11, 9, 8, 5, 4, 3, 1]
[15, 14, 13, 11, 9, 7, 6, 5, 3, 2]
[15, 14, 13, 11, 9, 7, 5, 4, 3, 1]
[15, 14, 13, 11, 9, 6, 5, 4, 3, 2]
[15, 14, 13, 11, 7, 6, 5, 4, 3, 1]
[15, 14, 13, 10, 9, 8, 7, 6, 5, 2]
[15, 14, 13, 10, 9, 8, 7, 6, 4, 1]
[15, 14, 13, 10, 9, 8, 7, 6, 3, 1]
[15, 14, 13, 10, 9, 8, 7, 5, 4, 2]
[15, 14, 13, 10, 9, 8, 7, 5, 3, 2]
[15, 14, 13, 10, 9, 8, 7, 5, 3, 1]
[15, 14, 13, 10, 9, 8, 6, 5, 4, 2]
[15, 14, 13, 10, 9, 8, 6, 5, 3, 2]
[15, 14, 13, 10, 9, 7, 6, 5, 4, 3]
[15, 14, 13, 10, 9, 7, 6, 5, 4, 2]
[15, 14, 13, 10, 9, 7, 6, 4, 3, 2]
[15, 14, 13, 10, 9, 7, 5, 4, 3, 2]
[15, 14, 13, 10, 9, 7, 5, 4, 3, 1]
[15, 14, 13, 10, 7, 6, 5, 4, 3, 2]
[15, 14, 13, 9, 8, 7, 6, 5, 4, 1]
[15, 14, 13, 9, 8, 7, 6, 4, 3, 1]
[15, 14, 12, 11, 10, 9, 8, 7, 6, 3]
[15, 14, 12, 11, 10, 9, 8, 6, 5, 4]
[15, 14, 12, 11, 10, 9, 8, 6, 5, 3]
[15, 14, 12, 11, 10, 9, 8, 6, 4, 3]
[15, 14, 12, 11, 10, 9, 8, 5, 4, 1]
[15, 14, 12, 11, 10, 9, 8, 4, 3, 2]
[15, 14, 12, 11, 10, 9, 7, 6, 4, 1]
[15, 14, 12, 11, 10, 9, 7, 6, 3, 2]
[15, 14, 12, 11, 10, 9, 7, 6, 3, 1]
[15, 14, 12, 11, 10, 9, 7, 5, 3, 2]
[15, 14, 12, 11, 10, 9, 6, 5, 3, 2]
[15, 14, 12, 11, 10, 9, 5, 4, 3, 2]
[15, 14, 12, 11, 10, 8, 7, 6, 5, 2]
[15, 14, 12, 11, 10, 8, 7, 6, 4, 2]
[15, 14, 12, 11, 10, 8, 7, 5, 3, 2]
[15, 14, 12, 11, 10, 8, 7, 4, 3, 2]
[15, 14, 12, 11, 10, 8, 6, 5, 4, 2]
[15, 14, 12, 11, 10, 8, 6, 5, 4, 1]
[15, 14, 12, 11, 10, 7, 6, 5, 4, 2]
[15, 14, 12, 11, 10, 7, 6, 4, 3, 1]
[15, 14, 12, 11, 9, 8, 7, 6, 5, 3]
[15, 14, 12, 11, 9, 8, 7, 6, 5, 1]
[15, 14, 12, 11, 9, 8, 7, 6, 4, 2]
[15, 14, 12, 11, 9, 8, 7, 6, 3, 2]
[15, 14, 12, 11, 9, 7, 6, 4, 3, 2]
[15, 14, 12, 11, 9, 6, 5, 4, 3, 2]
[15, 14, 12, 11, 8, 7, 6, 5, 4, 3]
[15, 14, 12, 10, 9, 8, 7, 6, 4, 3]
[15, 14, 12, 10, 9, 8, 7, 5, 4, 2]
[15, 14, 12, 10, 9, 8, 7, 5, 4, 1]
[15, 14, 12, 10, 9, 8, 7, 5, 3, 2]
[15, 14, 12, 10, 9, 8, 6, 5, 3, 2]
[15, 14, 12, 10, 9, 7, 6, 5, 3, 2]
[15, 14, 12, 10, 9, 6, 5, 4, 3, 2]
[15, 14, 12, 10, 8, 7, 6, 5, 4, 2]
[15, 14, 12, 10, 8, 6, 5, 4, 3, 2]
[15, 14, 12, 9, 8, 7, 6, 4, 3, 2]
[15, 14, 12, 8, 7, 6, 5, 4, 3, 2]
[15, 14, 11, 10, 9, 8, 7, 6, 5, 3]
[15, 14, 11, 10, 9, 8, 7, 6, 4, 2]
[15, 14, 11, 10, 9, 8, 7, 4, 3, 2]
[15, 14, 11, 10, 9, 8, 6, 5, 4, 3]
[15, 14, 11, 10, 9, 8, 6, 5, 4, 1]
[15, 14, 11, 10, 8, 7, 6, 5, 4, 3]
[15, 14, 11, 10, 8, 7, 6, 5, 3, 2]
[15, 14, 11, 10, 7, 6, 5, 4, 3, 2]
[15, 14, 11, 9, 8, 7, 6, 5, 4, 2]
[15, 14, 11, 9, 8, 7, 5, 4, 3, 2]
[15, 14, 10, 9, 8, 7, 6, 5, 4, 2]
[15, 14, 10, 8, 7, 6, 5, 4, 3, 2]
[15, 14, 9, 8, 7, 6, 5, 4, 3, 2]
[15, 13, 12, 11, 10, 9, 8, 6, 5, 2]
[15, 13, 12, 11, 10, 9, 8, 5, 4, 2]
[15, 13, 12, 11, 10, 9, 7, 6, 5, 4]
[15, 13, 12, 11, 10, 8, 7, 6, 5, 2]
[15, 13, 12, 11, 10, 8, 7, 6, 4, 3]
[15, 13, 12, 11, 10, 8, 7, 5, 4, 3]
[15, 13, 12, 11, 10, 7, 6, 4, 3, 2]
[15, 13, 12, 11, 9, 8, 7, 6, 5, 3]
[15, 13, 12, 11, 9, 8, 7, 6, 5, 2]
[15, 13, 12, 11, 9, 8, 7, 6, 3, 2]
[15, 13, 12, 11, 9, 8, 7, 5, 4, 2]
[15, 13, 12, 11, 9, 8, 6, 5, 4, 2]
[15, 13, 12, 11, 8, 7, 6, 5, 3, 2]
[15, 13, 12, 10, 9, 8, 6, 5, 4, 3]
[15, 13, 12, 10, 8, 7, 6, 5, 4, 3]
[15, 13, 12, 9, 8, 7, 6, 5, 4, 3]
[15, 13, 11, 10, 9, 8, 6, 5, 4, 2]
[15, 13, 11, 10, 8, 7, 6, 5, 4, 3]


15 stages, 12 taps:  (33 sets)

[15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 3]
[15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 4, 3]
[15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 2, 1]
[15, 14, 13, 12, 11, 10, 9, 8, 7, 5, 4, 1]
[15, 14, 13, 12, 11, 10, 9, 8, 6, 5, 4, 1]
[15, 14, 13, 12, 11, 10, 9, 8, 6, 3, 2, 1]
[15, 14, 13, 12, 11, 10, 9, 8, 5, 4, 2, 1]
[15, 14, 13, 12, 11, 10, 9, 7, 6, 5, 3, 1]
[15, 14, 13, 12, 11, 10, 9, 7, 5, 4, 3, 2]
[15, 14, 13, 12, 11, 10, 9, 6, 5, 4, 3, 2]
[15, 14, 13, 12, 11, 10, 8, 7, 6, 5, 3, 1]
[15, 14, 13, 12, 11, 10, 8, 7, 6, 4, 3, 2]
[15, 14, 13, 12, 11, 10, 8, 7, 5, 3, 2, 1]
[15, 14, 13, 12, 11, 10, 7, 6, 5, 3, 2, 1]
[15, 14, 13, 12, 11, 9, 8, 7, 6, 4, 3, 1]
[15, 14, 13, 12, 11, 9, 8, 7, 6, 3, 2, 1]
[15, 14, 13, 12, 11, 9, 8, 7, 5, 4, 2, 1]
[15, 14, 13, 12, 11, 9, 8, 6, 4, 3, 2, 1]
[15, 14, 13, 12, 11, 8, 7, 6, 5, 4, 2, 1]
[15, 14, 13, 12, 10, 9, 8, 7, 6, 4, 3, 1]
[15, 14, 13, 12, 10, 9, 8, 7, 5, 4, 2, 1]
[15, 14, 13, 12, 10, 9, 8, 6, 5, 3, 2, 1]
[15, 14, 13, 12, 10, 9, 7, 6, 5, 4, 3, 1]
[15, 14, 13, 11, 10, 9, 8, 7, 6, 5, 4, 1]
[15, 14, 13, 11, 10, 9, 8, 7, 6, 5, 3, 1]
[15, 14, 13, 11, 10, 9, 8, 7, 6, 5, 2, 1]
[15, 14, 13, 11, 10, 9, 8, 7, 5, 4, 3, 1]
[15, 14, 13, 11, 10, 9, 8, 6, 5, 4, 2, 1]
[15, 14, 13, 11, 10, 8, 7, 6, 5, 4, 3, 2]
[15, 14, 12, 11, 10, 9, 8, 7, 6, 5, 3, 1]
[15, 14, 12, 11, 10, 9, 8, 7, 5, 4, 3, 1]
[15, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 2]
[15, 13, 12, 11, 10, 9, 8, 7, 6, 5, 3, 2]


15 stages, 14 taps:  (3 sets)

[15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2]
[15, 14, 13, 12, 11, 10, 9, 8, 7, 6, 5, 3, 2, 1]
[15, 14, 13, 12, 11, 10, 9, 8, 6, 5, 4, 3, 2, 1]