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