IsAlphabetical

    public static bool IsAlphabetical(string p)
    {
        /*returns true if every character in the passed
        argument is either a lower- or upper-case letter
        of the English alphabet; false otherwise */

        bool result = true;

        byte[] word = StringToByteArray(p);
        foreach(byte b in word)
        {
            if(b < 65)
            {
                return false;
            }else{
                if (b > 122){
                    return false;
                }else{
                    if((b > 90) && (b < 97)){
                        return false;
                    }
                }
            }

        }

        return result;
    }