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