CF 89 div2 A

题目：118A - String Task

思路：water

#include <cstdlib>
#include <cstdio>
#include <cstring>
#include <algorithm>
#include <cmath>
#include <iostream>
#define MAXN 100000
using namespace std;
char s[12]={'a','o','y','e','u','i','A','O','Y','E','U','I'};
bool is_ok(char c)
{
    for(int i=0;i<12;i++)
        if(c==s[i])
            return true;
    return false;
}
int main()
{
    string s;
    cin>>s;
    for(int i=0;i<s.size();i++)
    {
        if(!is_ok(s[i]))
        {
            cout<<".";
            if(s[i]>='A'&&s[i]<='Z')
                cout<<char(s[i]-('A'-'a'));
            else
                cout<<s[i];
        }
    }
    cout<<endl;
    return 0;
}