def sumuj (list1:List[Int],list2:List[Int]):List[Int]= {
  def sumuj_2(l1:List[Int],l2:List[Int],temp:List[Int]):List[Int]=

    (l1, l2) match {
  case (Nil,Nil) => temp.reverse
  case (Nil,_) => sumuj_2(l1, l2.tail, l2.head::temp)
  case (_,Nil) => sumuj_2(l1.tail, l2, l1.head::temp)
  case (_,_) => sumuj_2(l1.tail, l2.tail, (l1.head + l2.head)::temp)
  }
    sumuj_2(list1,list2,Nil)

}