Codeforces_118A

//Codeforces Round 118A
#include <string>
#include <cctype>
#include <cstring>
#include <iostream>
using namespace std;
int main()
{
    int len;
    string s;
    char mass[101];
    cin >> s;
    len = s.size();
    strcpy(mass, s.c_str());
    for(int i=0;i<len;i++)
    {
        mass[i] = (char)tolower(mass[i]);
    }
    for(int i=0;i<len;i++)
    {
        if(mass[i]!='a' && mass[i]!='o' && mass[i]!='y' && mass[i]!='e' && mass[i]!='u' && mass[i]!='i')
        {
            cout << "." << mass[i];
        }
    }
    return 0;
}