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