using System;

public class Program

{

    public static void Main()

    {

//string phrase = "bonjour les amis";

        //String[] mots = phrase.Split(' ');

​

        Console.Write("Entrez une phrase : ");

        String phrase = Console.ReadLine();

        String[] mots = phrase.Split(' ');

​

        String[] motsUniques = new String[mots.Length];

        int taille = 0;

        for(int k = 0; k < mots.Length ; k++)

        {

            int x = 0;

            while (x < mots.Length && mots[k] != motsUniques[x])

            {

                Console.Write(x);

                x++;

            }

            if (x == 0)

            {       

                    Console.Write("bonjour");

                    motsUniques[motsUniques.Length] = mots[k];

            }

        }

        for(int k = 0; k < motsUniques.Length; k++)

        {

            Console.Write(motsUniques[k] + " ");

            Console.Write("yo");

        }

​

    }

}