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