gistfile1.py

f = open("words.txt")
o = open("output.txt", "w")


x = f.read()

y = x.split("\n")

j = "cantaloupe"
c = 1
o.write("graph G{\n")
for i in y:
    c = c + 1
    o.write("%s -- %s;\n" %(i, j))
    if c%2 == 0:
        j = i 

#    "{word} -- {foo};\n".format(word=i,foo=j)
o.write("}")