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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 format_op_hdr():
 """ Build the header """

    txt = 'Base Filename'.ljust(36) + ' '
    txt += 'Lines'.rjust(7) + ' '
    txt += 'Words'.rjust(7) + '  '
    txt += 'Unique'.ljust(8) + ''
    return txt