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

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

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

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

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