#include <iostream>
using namespace std;
int main()
{
    int n, x;
    cin >> n;
    char a[n + 1][n + 1];
    for (int i = 1; i <= n; i++)
    {
        x = i;
        for (int j = 1; j <= n; j++)
        {
            a[i][j] = 64 + x;
            if (x < n)
            {
                x++;
            }
            else
            {
                x = 1;
            }
        }
    }
    for (int i = 1; i <= n; i++)
    {
        for (int j = 1; j <= n; j++)
        {
            cout << "  " << a[i][j];
        }
        cout << endl;
    }
    return 0;
}