str = "Mary has a little lamb" 
 for w in str.split(" "):
      a = len(w)     
     print w, a

class Counter:
    def __init__(self, start=0, increment=1):
        self.counter = start
        self.increment = increment
        self.lock = threading.RLock()
    def __call__(self):
        self.lock.acquire()
        self.counter += self.increment
        i = self.counter
        self.lock.release()
        return i
    def Get(self):
        self.lock.acquire()
        i = self.counter
        self.lock.release()
        return i
    def Clear(self):
        self.lock.acquire()
        self.counter = 0
        i = self.counter
        self.lock.release()
        return i

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