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

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

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

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

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