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

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

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

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

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