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