def read_cin_mappings(mappings):
	"""
	Read cin mappings stored within file

	Params:
		mappings (str): path to cin mappings file

	Returns: a dict of {trigger: grade} representing mappings for cervical intraephitelial neoplasia
	"""

	with open(mappings, 'r') as file:
		lines = file.readlines()

	mappings = {}
	for line in lines:
		trigger, grade = line.strip().split('\t')
		mappings[trigger] = grade
	return mappings