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

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

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

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

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