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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 arglexsort(arrays):
 """ Returns the indices of the lexicographical sorting order of the supplied arrays. """

    dtypes = ','.join(array.dtype.str for array in arrays)
    recarray = np.empty(len(arrays[0]), dtype=dtypes)
    for i, array in enumerate(arrays):
        recarray['f%s' % i] = array
    return recarray.argsort()