Graph[{
{{6,7}},
{{6,8}},
{{7,9}},
{{8,10}},
{{9,10}},
{{11,12}},
{{11,13}},
{{11,14}},
{{11,15}},
{{12,13}},
{{12,14}},
{{12,15}},
{{13,14}},
{{13,15}},
{{14,15}}}, CircularEmbedding[15]]
