import re


def format_word(word):
	"""Returns input "word" with dashes removed and in lower case.
	
	:param word: word as string, a word in the corpus
	:type word: string
	:return: modified_word as string, modified version of "word" that is lower case and does not include dashes 
	:rtype: string
	"""
	dashes = r"[- ]*"
	modified_word = re.sub(dashes, "", word.lower())
	return modified_word