list_one =<<END
foo@example.org
bar@example.org
baz@example.org
qux@example.org
ham@example.org
ham@example.org
END


list_two =<<END
foo@example.org
bar@example.com
baz@example.com
qux@example.com
ham@example.com
ham@example.com
END


def merge str1, str2
  (str1+str2).split.uniq
end


puts merge(list_one, list_two).join("\n")