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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def tilequeue_stuck_tiles(cfg, peripherals):
 """ Check which files exist on s3 but are not in toi. """

    store = _make_store(cfg)
    format = lookup_format_by_extension('zip')
    layer = 'all'

    assert peripherals.toi, 'Missing toi'
    toi = peripherals.toi.fetch_tiles_of_interest()

    for coord in store.list_tiles(format, layer):
        coord_int = coord_marshall_int(coord)
        if coord_int not in toi:
            print serialize_coord(coord)