Sorted Spell Mockvita

# Mockvita Question 2 [Sorted Spell]
# Author - Aman Vishwakarma [L1]

# Utility function to convert number to strings
def num2words(num,join=True):
    '''words = {} convert an integer number into words'''
    units = ['', 'one', 'two', 'three', 'four', 'five', 'six', 'seven', 'eight', 'nine']
    teens = ['', 'eleven', 'twelve', 'thirteen', 'fourteen', 'fifteen', 'sixteen', \
             'seventeen', 'eighteen', 'nineteen']
    tens = ['', 'ten', 'twenty', 'thirty', 'forty', 'fifty', 'sixty', 'seventy', \
            'eighty', 'ninety']
    thousands = ['', 'thousand', 'million', 'billion', 'trillion', 'quadrillion', \
                 'quintillion', 'sextillion', 'septillion', 'octillion', \
                 'nonillion', 'decillion', 'undecillion', 'duodecillion', \
                 'tredecillion', 'quattuordecillion', 'sexdecillion', \
                 'septendecillion', 'octodecillion', 'novemdecillion', \
                 'vigintillion']
    words = []
    if num == 0:
        words.append('zero')
    else:
        numStr = '%d' % num
        numStrLen = len(numStr)
        groups = (numStrLen + 2) // 3
        numStr = numStr.zfill(groups * 3)
        for i in range(0, groups * 3, 3):
            h, t, u = int(numStr[i]), int(numStr[i + 1]), int(numStr[i + 2])
            g = groups - (i / 3 + 1)
            if h >= 1:
                words.append(units[h])
                words.append('hundred')
            if t > 1:
                words.append(tens[t])
                if u >= 1: words.append(units[u])
            elif t == 1:
                if u >= 1:
                    words.append(teens[u])
                else:
                    words.append(tens[t])
            else:
                if u >= 1: words.append(units[u])
            if (g >= 1) and ((h + t + u) > 0): words.append(thousands[g] + ',')
    if join: return ' '.join(words)
    return words

# Utility Function to give list of sorted spelling
def sortedSpelling(numbers):
    spellings = []
    for number in numbers:
        spellings.append(num2words(number))
    spellings.sort()
    return spellings

# Utility Function to give sorted spelling numbers
def sortedSpellingNumbers(spellings,numbers):
    sortedNumbers = [0,0]
    for number in numbers:
        sortedNumbers[spellings.index(num2words(number))] = number
    return sortedNumbers

# Main Driver Function
def Driver(M,N):
    # Initial Sorting
    numberSortedList = [int(M),int(N)]
    numberSortedList.sort()
    # Initial Spelling Sorting
    spellingSortedList = sortedSpelling(numberSortedList)
    numberSpellSorted = sortedSpellingNumbers(spellingSortedList,numberSortedList)
    while numberSortedList[0] != numberSortedList[1] and numberSpellSorted[0] != numberSpellSorted[1]:
        if numberSortedList[0] > 99999 or numberSortedList[1] > 99999:
            print("Out of Bounds")
            exit(0)
        # Add numbers condition
        numberSortedList[0] = numberSortedList[0] + numberSpellSorted[0]
        numberSortedList[1] = numberSortedList[1] + numberSpellSorted[1]
        # Now Sort Above Numbers
        numberSpellSorted.sort()
        # Now Spelling Sorted
        spellingSortedList = sortedSpelling(numberSortedList)
        numberSpellSorted = sortedSpellingNumbers(spellingSortedList, numberSortedList)
    print(numberSortedList[0])


# Take input from users
N,M = input().split()
Driver(M,N)