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

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

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

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

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