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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 fan_maxcfm(ddtt):
 """return the fan max cfm"""

    if str(ddtt.Maximum_Flow_Rate).lower() == 'autosize':
    # str can fail with unicode chars :-(
        return 'autosize'
    else:
        m3s = float(ddtt.Maximum_Flow_Rate)
        return m3s2cfm(m3s)