#!/usr/bin/python

import os
import sys
def walk (dirname):
  
  for item in os.listdir (dirname):
    if item.endswith (".talk"):
      os.remove( os.path.join(dirname, item))
    if os.path.isdir (os.path.join(dirname, item)):
      walk (os.path.join(dirname, item))

walk (sys.argv[1])