<html><head><meta name="color-scheme" content="light dark"></head><body><pre style="word-wrap: break-word; white-space: pre-wrap;">\def\RULES{\special{ps:
  /v {/ruley exch def /rulex exch def V} def
  /V {gsave newpath transform round exch round exch itransform
     moveto rulex 0 rlineto 0 ruley neg rlineto rulex neg 0 rlineto
     closepath fill grestore} def
}}
</pre></body></html>