stroka = "Mary has a little lamb"
maxlength = 0
splitted_str = stroka.split(" ")
for w in splitted_str:
      if len(w)>maxlength:
          maxlength = len(w)
      else:
         pass

for w in splitted_str:
    if len(w) == maxlength:
        print w
    else:
       pass