//
//  main.cpp
//  10824-01
//
//  Created by dhpark on 4/28/17.
//  Copyright © 2017 dhpark. All rights reserved.
//
//  네 수

#include <iostream>
#include <cstdio>
#include <string>
using namespace std ;
string A, B, C, D ;
long X, Y ;
int main(int argc, const char * argv[]) {
  cin >> A >> B >> C >> D ;
  A += B ;
  C += D ;
  X = stol(A.c_str());
  Y = stol(C.c_str());
  printf("%ld\n", X+Y);
  return 0;
}