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

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

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

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

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