#include <bits/stdc++.h>

using namespace std;
int main() {
    int n;
    cin >> n;
    for (int i = 1; i < n; i++) {
        for (int j = 1; j < 2 * n; j++) {
            if (i == j || i + j == 2 * n)
                cout << "*";
            else
                cout << " ";
        }
        cout << endl;
    }
    for (int i = 1; i <= n; i++) {
        for (int j = 1; j < n; j++) cout << " ";
        cout << "*" << endl;
    }
    return 0;
}