func Sum(l1, l2 *list.List) *list.List {
	i1 := listToInt(l1)
	i2 := listToInt(l2)
	l := intToList(i1 + i2)
	return l
}
// Sum solves problem 2.5

Sum solves problem 2.5
// Sum solves problem 2 . 5
func Sum(l1, l2 *list.List) *list.List {
	i1 := listToInt(l1)
	i2 := listToInt(l2)
	l := intToList(i1 + i2)
	return l
}
func Sum ( l1 , l2 * list . List ) * list . List { i1 := listToInt ( l1 ) i2 := listToInt ( l2 ) l := intToList ( i1 + i2 ) return l }
Sum solves problem 2.5
Sum solves problem 2 . 5