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