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