#include <bits/stdc++.h>

using namespace std;

const int NMax = (1 << 13);

int v[100][100];

int main() {
    //freopen("test.in", "r", stdin);


    int n = 16;
    int k = 0;
    for(int i = 1; i <= n; i++) {
        k = i % 2;
        for(int j = 1; j <= n; j++) {
            cout << k + 1 << " ";
            k ^= 1;
        }
        cout << "\n";
    }
    return 0;
}