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

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

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

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

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