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

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

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

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

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