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