Problem 2065 --单词识别

2065: 单词识别

Time Limit: 1 Sec  Memory Limit: 32 MB
Submit: 154  Solved: 14
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Description

输入一个英文句子,把句子中的单词(不区分大小写)按出现次数按从多到少把单词和次数在屏幕上输出来,要求能识别英文句号和逗号,即是说单词由空格、句号和逗号隔开。

Input

输入有若干行,总计不超过1000个字符。

Output

输出格式参见样例。

Sample Input

A blockhouse is a small castle that has four openings through which to shoot.

Sample Output

a:2
blockhouse:1
castle:1
four:1
has:1
is:1
openings:1
shoot:1
small:1
that:1
through:1
to:1
which:1

HINT




Source

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