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