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

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

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

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

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