5 8 graph
"u0" 150 50
"u1" 50 100
"u2" 100 200
"u3" 200 200
"u4" 250 100
"" u0 u1 4
"" u0 u2 4
"" u0 u3 3
"" u0 u4 6
"" u1 u2 3
"" u1 u4 7
"" u2 u3 2
"" u3 u4 5