B - String Task-优快云博客

本文解析了一个编程初学者的任务：给定一个包含大小写字母的字符串，需要删除所有元音字母，将大写辅音字母转换成小写，并在每个辅音字母前插入一个'.'字符。提供了一个简单的C++实现方案。

摘要生成于 C知道，由 DeepSeek-R1 满血版支持，前往体验 >

Problem description

Petya started to attend programming lessons. On the first lesson his task was to write a simple program. The program was supposed to do the following: in the given string, consisting if uppercase and lowercase Latin letters, it:

deletes all the vowels,
inserts a character "." before each consonant,
replaces all uppercase consonants with corresponding lowercase ones.

Vowels are letters "A", "O", "Y", "E", "U", "I", and the rest are consonants. The program's input is exactly one string, it should return the output as a single string, resulting after the program's processing the initial string.

Help Petya cope with this easy task.

Input

The first line represents input string of Petya's program. This string only consists of uppercase and lowercase Latin letters and its length is from 1 to 100, inclusive.

Output

Print the resulting string. It is guaranteed that this string is not empty.

Examples

Input

tour

Output

.t.r

Input

Codeforces

Output

.c.d.f.r.c.s

Input

aBAcAba

Output

.b.c.b
解题思路：题目比较简单。要求删除给定字符串中出现的6个元音字母，输出的时候在每个辅音字母前面加一个字符'.'，并且输出全部为小写。这里边判断边输出，水过。
AC代码：

 1 #include <bits/stdc++.h>
 2 using namespace std;
 3 const char obj[6]={'a','e','i','o','u','y'};
 4 bool is_letter(char ch){
 5     for(int i=0;i<6;++i)
 6         if(ch==obj[i])return true;
 7     return false;
 8 }
 9 int main()
10 {
11     char str[105];
12     cin>>str;
13     for(int i=0;str[i]!='\0';++i){
14         if(str[i]>='A'&&str[i]<='Z')str[i]+=32;
15         if(!is_letter(str[i]))printf(".%c",str[i]);
16     }
17     cout<<endl;
18     return 0;
19 }