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

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

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

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

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