def sumuj (list1:List[Int],list2:List[Int]):List[Int]= {
  def sumuj_2(list1:List[Int],list2:List[Int],temp:List[Int]):List[Int]=
    (list1, list2) match {
  case (Nil,Nil) => temp.reverse
  case (Nil,_) => sumuj_2(list1, list2.tail, list2.head::temp)
  case (_,Nil) => sumuj_2(list1.tail, list2, list1.head::temp)
  case (_,_) => sumuj_2(list1.tail, list2.tail, (list1.head + list2.head)::temp)
  }
}