title: bison shift reduce conflict, i don't know where
body: <p>Grammar: <a href="http://pastebin.com/ef2jt8Rg" rel="nofollow">http://pastebin.com/ef2jt8Rg</a>
  y.output: <a href="http://pastebin.com/AEKXrrRG" rel="nofollow">http://pastebin.com/AEKXrrRG</a></p>
  
  <p>I don't know where is those conflicts, someone can help me with this?</p>