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