#include <iostream>
using namespace std;

int main(int argc, char* argv[])
{
	int n,i,j;
	cout << "½Ð¿é¤Jn:\n";
	cin >> n;
	for (i=1; i<=n;i++)
	{
		for (j=1; j<=n;j++)
			if (i==1 || i==n)
				cout << "X";
			else
				if (j==1 || j==n)
					cout << "X";
				else
					cout << " ";

		cout << "\n";
	}
  return 0;
}