#include<iostream> using namespace std; int main() { int n, m; cin >> n >> m; int a[n][m], b[n][m]; for (int i = 0; i <= n - 1; i++) { for (int j = 0; j <= m - 1; j++) { cin >> a[i][j]; cin >> b[i][j]; } } for (int i = 0; i < n; i++) { for (int j = m - 1; j >= 0; j--) { cout << a[i][j] + b[i][j]; } } return 0; }