#
#  another simple route not used by Wikipedia!
#

# Node   neighbours[cost]

  a      b:2  c:4
  b      a:2  c:1
  c      b:1  a:4  d:1
  d      c:1  e:2
  e      d:2

find a -> e

#  answer is   a -> b -> c -> d -> e total 6