#include<bits/stdc++.h>
using namespace std;
int main()
{
	int n,j,i;
	cin>>n;
	for(i=0;i<n;i++){
		cout<<"*";
	} 
	cout<<endl;
	for(i=0;i<n-2;i++){
		cout<<"*";
		for(j=0;j<n-2;j++){
			cout<<" ";	
		}
		cout<<"*"<<endl;
	}
	for(i=0;i<n;i++){
		cout<<"*";
	}
	return 0;
}

/**************************************************************
	Problem: 1492
	User: zzz
	Language: C++
	Result: Accepted
	Time:11 ms
	Memory:2072 kb
****************************************************************/