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

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

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

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

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