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

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

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

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

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