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