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