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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 read_file_bytes(input_file_path):
 """ Read the file at the given file path and return its contents as a byte string, or ``None`` if an error occurred. :param string input_file_path: the file path :rtype: bytes """

    contents = None
    try:
        with io.open(input_file_path, "rb") as input_file:
            contents = input_file.read()
    except:
        pass
    return contents