</span><span class="p">)</span> <span class="k">then</span>
<span class="k">                write</span><span class="p">(</span><span class="n">output_unit_write</span><span class="p">,</span><span class="s1">&#39;(&quot;Atomic number not defined!&quot;)&#39;</span><span class="p">)</span>
             <span class="k">end if</span>
<span class="k">             exit             </span>
<span class="k">          end if</span>
<span class="k">       end do</span>
<span class="k">    else</span>
<span class="k"