graph G {
  A -- C [weight="1.0"]
  B -- D [weight="1.0"]
  B -- E [weight="2.0"]
  C -- B [weight="7.0"]
  C -- D [weight="3.0"]
  D -- E [weight="1.0"]
  E -- A [weight="1.0"]
  E -- B [weight="1.0"]
}