using System;

namespace PermutationDeuxOctets
{
	class MainClass
	{
		public static void Main (string[] args)
		{
			Console.WriteLine ("Saissez un nombre : ");
			short a = short.Parse(Console.ReadLine());
			Console.WriteLine ("Vous avez saisi " + a);
			short deuxieme = (short)(a & 255);
			a >>= 8;
			short premier = a;
			deuxieme <<= 8;
			a = (short )(premier | deuxieme);
			Console.WriteLine ("Après permutation des deux octets, on a " + a);
			deuxieme = (short)(a & 255);
			a >>= 8;
			premier = a;
			deuxieme <<= 8;
			a = (short)(premier | deuxieme);
			Console.WriteLine ("En permutant de nouveau, on retrouve bien " + a);			
		}
	}
}