#include<iostream>
using namespace std;
int main() {
    int n;
    cin>>n;
    
    for(int i=1;i<=n;i++) {
        for(int j=1;j<=i;j++) {
            cout<<"* ";
        }
        int space = 2*n - 2*i;
        for(int j=1;j<=space;j++) {
            cout<<"  ";
        }
        for(int j=1;j<=i;j++) {
            cout<<"* ";
        }
        cout<<endl;
    }

    for(int i=n;i>=1;i--) {
        for(int j=1;j<=i;j++) {
            cout<<"* ";
        }
        int space = 2*n - 2*i;
        for(int j=1;j<=space;j++) {
            cout<<"  ";
        }
        for(int j=1;j<=i;j++) {
            cout<<"* ";
        }
        cout<<endl;
    }

    return 0;
}
