import re


def clean_by_rules(jobtitle):
    """Remove numbers and normalize spaces

    Args:
        jobtitle (string) A string

    Returns: (string) the string with numbers removes and spaces normalized
    """
    # remove any words with number in it
    jobtitle = re.sub('\w*\d\w*', ' ', jobtitle).strip()

    # make one space between words
    jobtitle = ' '.join(jobtitle.split())

    return jobtitle