(0 21 17)(1 19 9 7 4)(2 6 3)(5 20 12 10 8)(11 15 13)(14 18 16)
ALLOWS (11/8)-SEQUENCE
1: (0 6 17)
(0)(1 19 9 7 4)(2 6 21 17 3)(5 20 12 10 8)(11 15 13)(14 18 16)
2: (1 19 9)
(0)(1 7 4)(2 6 21 17 3)(5 20 12 10 8)(9)(11 15 13)(14 18 16)(19)
3: (5 20 8)
(0)(1 7 4)(2 6 21 17 3)(5)(8 12 10)(9)(11 15 13)(14 18 16)(19)(20)
4: (3 21 17)
(0)(1 7 4)(2 6 21)(3)(5)(8 12 10)(9)(11 15 13)(14 18 16)(17)(19)(20)