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