#include <iostream>
using namespace std;
#define loop(i,b,e) for(auto i=b;i<=e;i++)

const int N=500;
int n,m,x,y,b[N][N],a[N][N];

bool isOut(int x,int y) {
    if (x<1 || x>n || y > m || y < 1) return true;
    else return false;
}

int main() {
    cin >> n >> m >> x >> y;
    loop(i,1,n+x)
        loop(j,1,m+y)
            cin >> b[i][j];
    loop(i,1,n+x)
        loop(j,1,m+y) {
            if (a[i][j] != 0) continue;
            if (b[i][j] == 0) continue;
            if(isOut(i,j) && !isOut(i-x,j-y))
                a[i-x][j-y] = b[i][j];
              else if(!isOut(i,j) && isOut(i-x,j-y))
                  a[i][j] = b[i][j];
               else
                 a[i][j] = b[i][j] - a[i-x][j-y];
       }
    loop(i,1,n) {
        loop(j,1,m)
            cout << a[i][j] << " ";
        cout << endl;
    }
}