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