#include <iostream>
using namespace std;
int n;

int main ()
{
    cin >> n;

    for (int i=1; i < (2*n); i++)
    {
        if (i == n+1)
        {
            for (int k = 1; k < n; k++)
                cout << ".";
            for (int k = 1; k <= 2*n ; k++)
                cout << "A";
            cout << endl;
        }
        for (int j = 1; j < 2*n - i; j ++)
        {
            cout << ",";
        }
        if (i!= 1) cout << "A";
        for (int l = 1; l < 2*i -2; l++)
        {
            cout << "'";
        }
        cout << "A" << endl;
    }
}