#include<iostream>
using namespace std;

int main(){
  int n, m, a[100][100], st, en;
  cin >> n >> m;
  cin >> st >> en;
  for (int i=0;i<n;i++){
    for (int j=0;j<m;j++)
      cin >> a[i][j];
  }
    int k=0;
    st--;
    en--;
    for (int i=st;i<n;i++){
      for (int j=0;j<m;j++){
        if (en+i-st<n){
          a[i][j]=a[en+i-st+1][j];
        }
        else {
          a[i][j]=0;
        }
      }
    }
    for (int i=0;i<n-(en-st+1);i++){
      for (int j=0;j<m;j++)
        cout << a[i][j] << " ";
        cout << endl;
    }
}