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