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

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

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

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

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