#include <iostream>
using namespace std;

int c, l;

int main()
{
    c = 1;
    while (c < 16)
    {
        l = 1;
        while (l < 16)
        {
            l+=4;
            cout << "1 2 3 4 ";
        }
        cout << '\n';
        l = 1;
        while (l < 16)
        {
            l+=4;
            cout << "3 4 1 2 ";
        }
        cout << '\n';
        l = 1;
        while (l < 16)
        {
            l+=4;
            cout << "2 1 4 3 ";
        }
        cout << '\n';
        l = 1;
        while (l < 16)
        {
            l+=4;
            cout << "4 3 2 1 ";
        }
        cout << '\n';
        c+=4;
    }
    return 0;
}