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