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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def vocalized_similarity(word1, word2):
 """ if the two words has the same letters and the same harakats, this function return True. The two words can be full vocalized, or partial vocalized @param word1: first word @type word1: unicode @param word2: second word @type word2: unicode @return: return if words are similar, else return negative number of errors @rtype: Boolean / int """


    stack1 = stack.Stack(word1)
    stack2 = stack.Stack(word2)
    last1 = stack1.pop()
    last2 = stack2.pop()
    err_count = 0
    vowels = HARAKAT
    while last1 != None and last2 != None:
        if last1 == last2:
            last1 = stack1.pop()
            last2 = stack2.pop()
        elif last1 in vowels and last2 not in vowels:
            last1 = stack1.pop()
        elif last1 not in vowels and last2 in vowels:
            last2 = stack2.pop()
        else:
            # break
            if last1 == SHADDA:
                last1 = stack1.pop()
            elif last2 == SHADDA:
                last2 = stack2.pop()
            else:
                last1 = stack1.pop()
                last2 = stack2.pop()
                err_count += 1
    if err_count > 0:
        return -err_count
    else:
        return True