#include<bits/stdc++.h>
using namespace std;
int n;
int main(){
    cin>>n;
    for(int i=1;i<=n;i++){   
        for(int j=1;j<=n;j++){
            if(i==1||i==n||j+i==n+1){
                cout<<"*";    
            } else{ cout<<" ";
                      
            }
              
        }
          
        cout<<endl;
    }
      
  
    return 0;
}
/**************************************************************
	Problem: 1493
	User: linmiaoling
	Language: C++
	Result: Accepted
	Time:11 ms
	Memory:2072 kb
****************************************************************/