(0 19 17)(1 20 8)(2 18 4)(3 16 5 21 6)(7 15 14 12 9)(10 13 11)
ALLOWS (11/8)-SEQUENCE
1: (0 2 18)
(0 4 2 19 17)(1 20 8)(3 16 5 21 6)(7 15 14 12 9)(10 13 11)(18)
2: (1 20 8)
(0 4 2 19 17)(1)(3 16 5 21 6)(7 15 14 12 9)(8)(10 13 11)(18)(20)
3: (2 19 17)
(0 4 2)(1)(3 16 5 21 6)(7 15 14 12 9)(8)(10 13 11)(17)(18)(19)(20)
4: (5 21 16)
(0 4 2)(1)(3 16 6)(5)(7 15 14 12 9)(8)(10 13 11)(17)(18)(19)(20)(21)