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

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

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

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

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