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

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

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

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

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