import re


def addCapTag(word):
    """ Finds a word with at least 3 characters capitalized and adds the tag ALL_CAPS_ """
    if(len(re.findall("[A-Z]{3,}", word))):
        word = word.replace('\\', '' )
        transformed = re.sub("[A-Z]{3,}", "ALL_CAPS_"+word, word)
        return transformed
    else:
        return word