# functions go here...
def distance(question, measurement_options):
    """Checks the distance type that the user wants"""

    while True:
        error = f"Choose from {measurement_options}"
        measurement = input(question).lower()

        for item in measurement_options:
            if measurement == item:
                return item

        else:
            print(error)


measurement_list = ["mm", "millimeters", "millimeter", "hh", "hg", "gh"]


user_measurement = distance("select a measurement ", measurement_list)

print(user_measurement)