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