'attempt to deduce if a pre 100 year was lost
due to padded zeros being taken off'

def find_probable_year_index(self, tokens):

    for (index, token) in enumerate(self):
        potential_year_tokens = _ymd.find_potential_year_tokens(token, tokens)
        if ((len(potential_year_tokens) == 1) and (len(potential_year_tokens[0]) > 2)):
            return index
