def METHOD_NAME(f1, f2):
    # call after remove_shbang
    # ignore blank lines
    # remove lines starting with #
    # ignore multi-line """ or ''' comments
    f1s = [line for line in f1.splitlines() if line.strip() and not line.strip().startswith('#')]
    f2s = [line for line in f2.splitlines() if line.strip() and not line.strip().startswith('#')]
    if not f1s or not f2s:
        return f1, f2
    for delim in ['"""', "'''"]:
        for f in (f1s, f2s):
            if delim in f[0]:
                if len(f[0].split(delim)) == 2:
                    f.pop(0)
                    while not delim in f[0]:
                        f.pop(0)
                f.pop(0)
    return '\n'.join(f1s), '\n'.join(f2s)