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

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

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

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

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