// https://omegaup.com/arena/problem/Suma-de-matrices-rectangulares
#include <stdio.h>

int main( ) {
   int n, m;
   scanf("%d%d", &n, &m);

   int a[n][m], b[n][m];
   for (int i = 0; i < n; ++i) {
      for (int j = 0; j < m; ++j) {
         scanf("%d", &a[i][j]);
      }
   }
   for (int i = 0; i < n; ++i) {
      for (int j = 0; j < m; ++j) {
         scanf("%d", &b[i][j]);
      }
   }

   for (int i = 0; i < n; ++i) {
      for (int j = 0; j < m; ++j) {
         printf("%d ", a[i][j] + b[i][j]);
      }
      printf("\n");
   }
}