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

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

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

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

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