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

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

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

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

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