#include <iostream>

using namespace std;

int main()
{
    int n, i, m;
    cin>>n;
    for ( i = 1; i <= n; ++i) {
        for ( m = 1; m <= i; ++m)
          cout << '*';
          cout << '\n';
    }
    for (i = 1; i <= n; ++i) {
        for (m = 1; m <= 2 * n; ++m)
            if (m >= n + i)
              cout << '*';
            else
                cout << ' ';
        cout << '\n';
    }
    return 0;
}