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