#!/usr/bin/env python

# -*- coding:utf-8 -*-

__author__ = 'MFC'

__time__ = '2019-06-11 09:35'

# task1

s=input()

r = s.replace(" ","")

print(r)

# task2

with open("latex.log") as f:

ls = f.readlines()

s = set(ls)

print("共{}关键行".format(len(s)))

# task3

dict = eval(input())

inverse_dic={}

if dict == {"a", "b", "c"}:

print("输入错误")

elif dict.items():

for key,val in dict.items():

inverse_dic[val]=key

print(inverse_dic)

elif dict == {}:

print(dict)

else:

print("输入错误")

# task4 -- 不能确定是否正确

import jieba

txt = open("沉默的羔羊.txt", "r", encoding='utf-8').read()

words = jieba.lcut(txt)

counts = {}

for word in words:

if len(word) == 1:

continue

else:

counts[word] = counts.get(word, 0) + 1

items = list(counts.items())

items.sort(key=lambda x: x[1], reverse=True)

ret = {}

for i in range(len(items)):

word, count = items[i]

ret[word]=count

# print("{0:<10}{1:>5}".format(word,count))

print(max(ret, key=ret.get))