print "Introduce una palabra!"
palabra1 = str(raw_input("Palabra 1: "))
palabra2 = str(raw_input("Palabra2:  " ))
palabra3 = str(raw_input("palabra3:  "))

if len(palabra1)<len(palabra2):
          if len(palabra1)<len(palabra1)):
                          print  palabra1
           else
                          print palabra2
  else
         if len(palabra2)<len(palabra3)):
                                  print palabra 3