SoundX Application In C#

using System;
using System.Collections;

namespace Com
{

/// <summary>
///Description for GSoundX.
///SoundX classifies words for how they sound by asssigning a short numeric
///code based on a group of letters.
///Take the first letter.
///Then, for each of the subsequent letters, score a code for the group it
///belongs to. There are 6 groups :
///Group Letters
///1 BFPV
///2 CGJKQSXZ
///3 DT
///4 L
///5 MN
///6 R
///Ignore all other letters and characters (vowels, h, punctuation, etc.)
//////If a code has already occurred, ignore it. Continue until you have 4 characters,
///if there are less, add zeroes until you have 4.
///And they all sound the same or similar.
/// </summary>
public class SoundX
{

static ArrayList aList1 = new ArrayList(4);
static ArrayList aList2 = new ArrayList(8);
static ArrayList aList3 = new ArrayList(2) ;
static ArrayList aList4 = new ArrayList(1);
static ArrayList aList5 = new ArrayList(2);
static ArrayList aList6 = new ArrayList(1);
static ArrayList aListExcep = new ArrayList(6);

private static void setArrayLists()
{

aListExcep.Add("A");
aListExcep.Add("E");
aListExcep.Add("I");
aListExcep.Add("O");
aListExcep.Add("U");
aListExcep.Add("H");

aList1.Add("B");
aList1.Add("F");
aList1.Add("P");
aList1.Add("V");

aList2.Add("C");
aList2.Add("G");
aList2.Add("J");
aList2.Add("K");
aList2.Add("Q");
aList2.Add("S");
aList2.Add("X");
aList2.Add("Z");

aList3.Add("D");
aList3.Add("T");

aList4.Add("L");

aList5.Add("M");
aList5.Add("N");

aList6.Add("R");

}

/// <summary>
/// This method does the core functionality of
/// geting the soundx code for the giving string
/// </summary>
///