6 10 graph
"u0" 200  50
"u1"  50 100
"u2"  50 200
"u3" 200 250
"u4" 350 200
"u5" 350 100
"" u0 u2 13
"" u0 u4 16
"" u0 u5 8
"" u1 u3 6
"" u1 u5 10
"" u2 u3 14
"" u2 u5 11
"" u3 u4 5
"" u3 u5 17
"" u4 u5 7