import re


def strip_prefix(string):
    """
    A lot of Workday names, which we are unfortunately forced to use as identifiers,
    begin with an "AX_..." prefix as in "AU_CERAM" (for the Ceramics academic unit)
    or "AP_Fall_2019" for the Fall academic period. We need these names for
    matching but don't use this prefix.
    """
    return re.sub(r'^A[A-Z]_', '', string)