import re
import string


def remove_articles(text):
    regex = re.compile(r"\b(a|an|the)\b", re.UNICODE)
    return re.sub(regex, " ", text)


def white_space_fix(text):
    return " ".join(text.split())


def remove_punc(text):
    exclude = set(string.punctuation)
    return "".join(ch for ch in text if ch not in exclude)


def lower(text):
    return text.lower()