LS, SETS 
 

</PRE>
<h4><a name="Brief_I/O">Brief_I/O</a></h4>
<PRE>
 
   VARIABLE  I/O  DESCRIPTION 
   --------  ---  -------------------------------------------------- 
   item       I   Item to be removed. 
   set       I/O  Removal set. 
 </PRE>
<h4><a name="Detailed_Input">Detailed_Input</a></h4>
<PRE>
 
   item        is an item which is to be removed from the specified
               set. item may or may not already be an element of the
               set.  Trailing blanks in item are not significan