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

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

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

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

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