问题 2997 --Extra Krunch

2997: Extra Krunch

时间限制: 1 Sec  内存限制: 30 MB
提交: 0  解决: 0
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题目描述

A krunched word has no vowels ("A", "E", "I", "O", and "U") and no repeated letters. Removing vowels and letters that appear twice or more from MISSISSIPPI yields MSP. In a krunched word, a letter appears only once, the first time it would appear in the unkrunched word. Vowels never appear.

Krunched phrases similarly have no vowels and no repeated letters. Consider this phrase:
        RAILROAD CROSSING

and its krunched version:
        RLD CSNG

Blanks are krunched differently. Blanks are removed so that a krunched phrase has no blanks on its beginning or end, never has two blanks in a row, and has no blanks before punctuation. Otherwise, blanks not removed. If we represent blanks by "_",
        MADAM_I_SAY_I_AM_ADAM__

krunches to:
        MD_SY

where the single remaining blank is shown by "_".

Write a program that reads a line of input (whose length ranges from 2 to 70 characters), and krunches it. Put the krunched word or phrase in the output file. The input line has only capital letters, blanks, and the standard punctuation marks: period, comma, and question mark.

输入

A single line to be krunched.

输出

A single krunched line that follows the rules above.

样例输入

NOW IS THE TIME FOR ALL GOOD MEN TO COME TO THE AID OF THEIR COUNTRY.

样例输出

NW S TH M FR L GD C Y.

来源

 

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