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

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

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

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

(0 15 2)(1 6 3)(4 14 5)(7)(8)(9)(10)(11)(12)(13 18 16)(17)(19)(20)