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