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