12391: 单词识别
Memory Limit:32 MB
Time Limit:1.000 S
Judge Style:Text Compare
Creator:
Submit:3
Solved:0
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 Copy
A blockhouse is a small castle that has four openings through which to shoot.
Sample Output Copy
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