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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 build_data_list(lst):
 """ returns the html with supplied list as a HTML listbox """

    txt = '<H3>' + List + '<H3><UL>'
    for i in lst:
        txt += '<LI>' + i + '</LI>'
        
    txt += '<UL>'
    return txt