alOK</span></span>
<span><span class="co">#&gt; 1      AB 2000   TRUE</span></span>
<span><span class="co">#&gt; 2      AB 2001   TRUE</span></span>
<span><span class="co">#&gt; 3      GB 2000   TRUE</span></span>
<span><span class="co">#&gt; 4      GB 2001   TRUE</span></span>
<span><span class="fu"><a href="https://rdrr.io/r/base/all.html" class="external-link">all</a></span><span class="op">(</span><span class="va">Check</span><span class="op">$</span><span class="va">EBalOK</span> <span class="op"><a hr