CodeForces #118A String Task [java]

import java.util.Scanner;

public class StringTask_118A {

	public static void main(String[] args) {
		Scanner scan = new Scanner(System.in);
		String s = scan.next();
		String vowels = "AaOoYyEeUuIi";
		for(int i=0;i<s.length();i++) {
			if(!vowels.contains(Character.toString((s.charAt(i))))) {
				System.out.print("."+Character.toString((s.charAt(i))).toLowerCase());
			}
		}
		System.out.println();
	}
}