n class="r-pr">#&gt;</span> [101] "va_08"      "qc_08"      "vc_08"      "qe_08"      "ve_08"     </span>
<span class="r-out co"><span class="r-pr">#&gt;</span> [106] "qa_09"      "va_09"      "qc_09"      "vc_09"      "qe_09"     </span>
<span class="r-out co"><span class="r-pr">#&gt;</span> [111] "ve_09"      "qa_10"      "va_10"      "qc_10"      "vc_10"     </span>
<span class="r-out co"><span class="r-pr">#&gt;</span> [116] "qe_10"      "ve_10"      "qa_11"      "va_11"      "qc_11"     </span>
<span c