-->
 <span style="color: #008080;">try</span>
     <span style="color: #000000;">one_of<span style="color: #0000FF;">(<span style="color: #000000;">these<span style="color: #0000FF;">)</span>
 <span style="color: #008080;">catch</span> <span style="color: #000000;">e</span>
     <span style="color: #008080;">if</span> <span style="color: #000000;">e<span style="color: #0000FF;">[<span style="color: #000000;">E_CODE<span style="color: #0000FF;">]<span style="color: #0000FF;">=<span style="color: #000000;">501</span> <span style="color: #008080;">then</span>
         <span style="color: #7060A8;">puts<span style="color: #0000FF;">(<span style="color: #000000;">1<span style="color: #0000FF;">,<span style="color: #008000;">"that's no excuse!\n"<span style="color: #0000FF;">)</span>
     <span style="color: #008080;">else</span>
         <span style="color: #008080;">throw<span style="color: #0000FF;">(<span style="color: #000000;">e<span style="color: #0000FF;">)</span>
     <span style="color: #008080;">end</span> <span style="color: #008080;">if</span>
 <span style="color: #008080;">end</span> <span style="color: #008080;">try
<!--