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

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

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

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

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