#include <iostream>
#include <algorithm>
#include <iterator>
#include <vector>
#include <cassert>

using namespace std;

int main() {

  typedef int Number;
  typedef std::vector<Number> Vector;

  Vector numbers;

  copy(istream_iterator<Number>(cin),
       istream_iterator<Number>(),
       back_inserter<Vector>(numbers));

  // np. sumy w wierszu:

  assert(numbers.size() % 2 == 0);

  for (size_t i = 0; i < numbers.size(); i += 2) {
    cout << numbers[i] + numbers[i+1] << endl;
  }
	
  return 0;
}