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