#include <iostream>

using namespace std;
int main()
{
    int x;
    cin >> x ;

    for(int i = 0; i < x ; i++){
        int j;
        j = 0;

        if(i == 0 | i == x-1 ){
            for( ; j < x ; j++){
                cout << "*";
            }  
        }
        else{
            for(int q = 0; q < x; q++)
            {
                if(q == 0 | q == x-1 | q == i | q+i == x-1){
                    cout << "*";
                }
                else
                    cout << " ";
            }
        }

        cout << "\n";
    }

    



}