fpIn = open("test.txt","r")
fpOut = open("test2.txt","w")
while 1:
  LineN = fpIn.readline()
  # 1) Test End of File
  if LineN == "":
    # Normal exit
    break
  liste = LineN.replace("\n","")
  liste = liste.split("_")
  #print liste
  # tri
  liste.sort()
  print liste
  listeTriee = "_".join(liste)
  print listeTriee
  a = raw_input("appuyer sur une touche")
  fpOut.write(listeTriee+"\n")    
fpIn.close()
fpOut.close()