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