/a></span><span class='op'>(</span><span class='st'>"2015-12-31"</span>, <span class='fl'>5</span><span class='op'>)</span>,
                 LBTESTCD <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'>5</span><span class='op'>]</span>,
                 LBORRES <span class='op'>=</span> <span class='fl'>1</span><span class='op'>:</span><span class='fl'>5</span>,
                 stringsAsFactors <span class='op