using System;

public class Program

{

    public static void Main()

    {

        string[] words = "I'm a bad programmer and I should feed bad.".Split(' ');

        string[] alternatives = { "programmer", "something else" };

        string checkWord = "bad";

        Predicate<string> exists = x => string.CompareOrdinal(x, checkWord) == 0;

        while (Array.FindIndex(words, exists) >= 0)

        {

            Console.WriteLine(string.Format("Found \"{0}\", let's try something else.", checkWord));

            checkWord = "something else";

        }

        Console.WriteLine(string.Format("Unique name: \"{0}\".", checkWord));

    }

}