#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;
}
