def mask_table_m() -> dict[int, str]:
    """Table of mask codes and correction level for correction level M.

    Returns:
        dict[int, str]: Dictionary of the form {mask number: mask and
        correction Level Code}
    """
    table = {
        0: "101010000010010",
        1: "101000100100101",
        2: "101111001111100",
        3: "101101101001011",
        4: "100010111111001",
        5: "100000011001110",
        6: "100111110010111",
        7: "100101010100000"
    }

    return table