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