#include <bits/stdc++.h>   using namespace std;   ifstream in( in.txt );   bool needToDelete(char c) {     return tolower(c) ==  a  || tolower(c) ==  o  || tolower(c) ==  y  ||            tolower(c) ==  e  || tolower(c) ==  u  || tolower(c) ==  i ;   }   int main(int argc, char** argv) {     string s;     cin >> s;     string ans;     for (int i = 0; i < s.size(); i++) {       if (!needToDelete(s[i])) {         ans +=  . ;         ans += tolower(s[i]);       }     }     cout << ans;     return 0;   }   