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