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

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

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

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

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