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

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

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

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

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