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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:
 """Returns the big-endian integers specified by groups of bits. Args: bit_groups: Groups of descending bits, each specifying a big endian integer with the 1s bit at the end. Returns: A tuple containing the integer for each group. """

    return tuple(_big_endian_int(bits) for bits in bit_groups)