using System;

using System.Collections.Generic;

using System.Linq;

public class Program

{

    public class Test

    {

        public int iCounter { get; set; }

        public string strLetters { get; set; }

    }

    public static void Main()

    {

        string strLettersList = "a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,p,q,r,s,t,u,v,w,x,y,z";

        string[] straVowels = "a,e,i,o,u".Split(',');

​

        List<string> strList = strLettersList.Split(',').ToList();

        List<Test> testList = new List<Test>();

​

        for(int i = 0; i < strList.Count(); i++)

        {

            testList.Add(new Test

            {

                iCounter = i,

                strLetters = strList[i]

            });

        }

​

        List<Test> output = testList.Where(x => straVowels.Contains(x.strLetters)).Select(x => x).ToList();

​

        foreach(Test item in output)

        {

            // TODO: Output the string from the function outputText

            Console.WriteLine(OutputText(item.strLetters, item.iCounter));

        }

​

        Console.ReadLine();

    }

​

    private static string OutputText(string strLetter, int iPosition)

    {

        strLetter = strLetter.ToUpper();

        int iAlphPosition = iPosition+1;

        return string.Format("{0} is at position {1} in the array, and {2} in the alphabet", strLetter, iPosition, iAlphPosition);

    }

}