#include <iostream>
#include <cmath>

using namespace std;

template <typename X> void solve(X **mas, int size1, int size2) {
    for (int i = 0; i < size1; i++) {
        for (int j = 0; j < size2; j++) {
            cin >> mas[i][j];
        }
    }
}
template <typename X> void print(X **mas, int size1, int size2) {
    for (int i = 0; i < size1; i++) {
        for (int j = 0; j < size2; j++) {
            cout << mas[i][j] << " ";
        }
        cout << endl;
    }
}
template <typename X> void func (X **mas, int a, int b) {
    for (int i = 0; i < a; i++) {
        for (int j = 0; j < b; j++) {
            mas[i][j] = 0;
        }
    }

}

int main() {
    int n,m;
    cin >> n >> m;
    int **a = new int *[n];
    for (int i = 0; i < n; i++) {
        a[i] = new int [m];
    }
    solve(a,n,m);
    func(a,2,2);
    print(a,n,m);


}