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