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