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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 tag_arxiv_more(line):
 """Tag old arxiv report numbers Either formats: * hep-th/1234567 * arXiv:1022111 [hep-ph] which transforms to hep-ph/1022111 """

    line = RE_ARXIV_CATCHUP.sub(ur"\g<suffix>/\g<year>\g<month>\g<num>", line)

    for report_re, report_repl in RE_OLD_ARXIV:
        report_number = report_repl + ur"/\g<num>"
        line = report_re.sub(
            u'<cds.REPORTNUMBER>' + report_number + u'</cds.REPORTNUMBER>',
            line
        )
    return line