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