#include<iostream>
using namespace std;
int main()
{
    string result;
    result = "No"
    int a[3][3];
    for (int i = 0; i < 2; i++){
      for (int j = 0; j < 2; j++){
        cin << a[i][j]
      }
    }
      cout << result;
    return 0;
}