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

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

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

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

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