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

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

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

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

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