using System;

public class Program

{

    public static void Main(string[] args)

    {

        Console.WriteLine("pig latin is hard to code");

        PigLatinConsole.WriteLine("pig latin is hard to code");

        Console.WriteLine("pIg laTIn iS haEdEr TO cODE In MiXeD CAse");

        PigLatinConsole.WriteLine("pIg laTIn iS haEdEr TO cODE In MiXeD CAse");

    }

}

​

public static class PigLatinConsole

{

    private const string consonants = "bcdfghjklmnpqrstvwxyz";

    private const string vowels = "aeiou";

    public static void WriteLine(string str)

    {

        // we need to modify each of the words to pig latin

        var words = str.Split();

        foreach (var word in words)

        {

            string strToPrint;

            // so we don't have to store upper and lowercase

            var strLower = word.ToLower();

            if (strLower.IndexOfAny(consonants.ToCharArray()) == 0)

            {

                var firstVowelIdx = strLower.IndexOfAny(vowels.ToCharArray());

                // start the word at the first vowel

                strToPrint = word.Substring(firstVowelIdx, word.Length - firstVowelIdx);

                // add the beginning of the word to the end

                strToPrint += word.Substring(0, firstVowelIdx);

            }

            else

            {

                // according to wikipedia, "yay" ends pig latin words starting with vowel

                // https://en.wikipedia.org/wiki/Pig_Latin#Rules

                strToPrint = word + "y";

            }

            // end the word with "ay" and a space

            Console.Write(strToPrint + "ay ");

        }

        Console.WriteLine();

    }

}