#include <stdio.h>
#include <stdlib.h>

#define M 25
#define N 50

int main(void)
{

  int a[M][N], i = 0, j = 0;

  while(j < N){
    for(i = 0; i < M; i++){
      if(i == M-1){
        a[i][j] = 0;
        j++;
        i = 0;
      }
      else
        a[i][j] = 0;
    }
  }

  while(j < N){
    for(i = 0; i < M; i++){
      if(i == M-1){
        printf("%d\n", a[i][j]);
        j++;
        i = 0;
      }
      else
        printf("%d ", a[i][j]);
    }
  }


  return 0;
}