#include <algorithm>
#include <iostream>
#include <iterator>
#include <limits>
#include <locale>
#include <sstream>
#include <string>
 
const std::string VOWELS = "AEIOUY"; // assume Y is always a vowel
 
int main()
{
    // read the input
    std::string input;
	while (!(std::cin >> input))
	{
	    std::cout << "Invalid input, try again\n";
		std::cin.clear();
		std::cin.ignore(std::numeric_limits<std::streamsize>::max(), '\n');
	}
 
	// erase vowels
	input.erase(std::remove_if(input.begin(), input.end(), [&](char c)
	{
	    std::locale loc;
		c = std::toupper(c, loc);
		return std::find(VOWELS.cbegin(), VOWELS.cend(), c) != VOWELS.cend();
	}), input.end());
 
	// transform to lowercase
	std::transform(input.begin(), input.end(), input.begin(), [](char c)
	{
	    std::locale loc;
		return std::tolower(c, loc);
	});
 
	// add . before every remaining letter
	std::ostringstream oss;
	std::for_each(input.begin(), input.end(), [&](char c)
	{
	    std::locale loc;
	    if (std::isalpha(c, loc))
		{
		    oss << ".";
		}
		oss << c;
	});
 
	input = oss.str();
	std::cout << "Resulting string:  " << input << std::endl;
    return 0;
}

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YWJjZGVmZ2hpamtsbW5vcHFyc3R1dnd4eXoxMjM0NTY3ODkw

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