(0 20 17 15 12)(1 19 3)(2 11 9 6 4)(5 8 7)(10 14 13)(16 21 18)
ALLOWS (11/8)-SEQUENCE
1: (0 2 17)

(0 15 12)(1 19 3)(2 20 17 11 9 6 4)(5 8 7)(10 14 13)(16 21 18)
2: (1 19 3)

(0 15 12)(1)(2 20 17 11 9 6 4)(3)(5 8 7)(10 14 13)(16 21 18)(19)
3: (16 21 18)

(0 15 12)(1)(2 20 17 11 9 6 4)(3)(5 8 7)(10 14 13)(16)(18)(19)(21)
4: (2 20 9)

(0 15 12)(1)(2 6 4)(3)(5 8 7)(9 17 11)(10 14 13)(16)(18)(19)(20)(21)