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

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

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

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

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