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