#include<bits/stdc++.h>
using namespace std;
int main()
{
	int i,n,j;
	char a[10][10];
	cin>>n;
	for(i=0;i<n;i++){
		for(j=0;j<n;j++){
			if(i==0||j==0||i==n-1||j==n-1)
			a[i][j]='*';
			else
			a[i][j]=' ';
		}
	}
	for(i=0;i<n;i++){
		for(j=0;j<n;j++){
			cout<<a[i][j];
		}cout<<endl;
	}

return 0;

}
/**************************************************************
	Problem: 1492
	User: houshanglin
	Language: C++
	Result: Accepted
	Time:12 ms
	Memory:2072 kb
****************************************************************/