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

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

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

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

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