using System;

namespace JoliCarre
{
	class MainClass
	{
		public static void Main (string[] args)
		{
			Console.Write ("Saisir n : ");
			int n = int.Parse(Console.ReadLine());
			
			for (int i = 1 ; i <= n  ; i++)
			{
				for (int j = 1 ; j <= n ; j++)
					Console.Write("X ");
				Console.WriteLine();
			}
		}
	}
}