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