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

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

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

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

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