// Palindrome.java

import java.util.Scanner;

public class Palindrome {
    public static boolean isPalindrome(String str) {
        int size = str.length();

        if (size <= 1) {
            return true;
        } else if (str.charAt(0) != str.charAt(size - 1)) {
            return false;
        } else {
            return isPalindrome(str.substring(1, size - 1));
        }
    }

    public static void main(String[] args) {
        String line;
        Scanner in = new Scanner(System.in);
        do {
            line = in.nextLine();
            if (isPalindrome(line)) {
                System.out.println("This IS a palindrome!");
            } else {
                System.out.println("This is NOT a palindrome!");
            }
        } while (line.length() > 0);
    }
}