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