using static System.Console;

public class Program {

    public static void Main() {

        WriteLine(EhPalindromo("4004"));

        WriteLine(EhPalindromo("4002"));

    }

    public static bool EhPalindromo(string texto) {

        for (int i = texto.Length - 1; i > texto.Length / 2; i--) {

            if (texto[i] != texto[texto.Length - i - 1]) {

                return false;

            }

        }

        return true;

    }

}