#include <bits/stdc++.h>
using namespace std;
int main()
{int n;
cin>>n;
for(int i=1;i<=n;i++){
	for(int j=1;j<=n;j++){
		if(i==1||i==n||i+j==n+1)cout<<"*";
		else cout<<" ";
		
	}
	cout<<endl;
}

	return 0;
}

/**************************************************************
	Problem: 1493
	User: lzk
	Language: C++
	Result: Accepted
	Time:17 ms
	Memory:2072 kb
****************************************************************/