#!/usr/bin/env python

from HTMLParser import HTMLParser
import sys, formatter
from xml.dom.minidom import parse, parseString
import xml.xpath

if __name__ == '__main__':
   
   doc = ""
   
   for line in sys.stdin.readlines():
      doc = doc + line
      
   dom = parseString(doc)
   
   links = xml.xpath.Evaluate("//h3[@class='desc']/a[1]", dom)
   
   seen_links = {}
   
   for link in links:
      href = link.getAttribute("href")
      if seen_links.has_key(href):
         post = link.parentNode.parentNode
         post.parentNode.removeChild(post)  
      else:
         seen_links[href] = 1 

   # print dom.writexml(sys.stdout)