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

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

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

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

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