import java.util.Scanner;

public class Login {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);

        String username = scanner.nextLine();
        String password = "";
        for (int i = username.length() - 1; i >= 0 ; i--) {
            password = password + username.charAt(i);
        }

       String input_password = scanner.nextLine();

        while(!password.equals(input_password)){

            input_password = scanner.nextLine();

        }
        System.out.printf("User %s logged in.", username);
    }
}