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

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

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

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

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