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