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

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

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

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

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