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

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

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

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

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