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

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

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

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

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