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