k 12"</span>, <span class='st'>"Week 24"</span><span class='op'>)</span>,
                 QSSTRESC <span class='op'>=</span> <span class='va'>LETTERS</span><span class='op'>[</span><span class='fl'>1</span><span class='op'>:</span><span class='fl'>6</span><span class='op'>]</span>,
                 stringsAsFactors <span class='op'>=</span> <span class='cn'>FALSE</span><span class='op'>)</span>

<span class='fu'>check_qs_qsdtc_after_dd</span><span class='op'>(</span><span class='va'>AE</span>, <span class=