import java.util.Scanner;
public class Palindrome {
    public static void main(String[] args) {

    }

    public static void palindrome() {
        Scanner s = new Scanner(System.in);
        String input = s.next();

        for(int i = 0; i < input.length()/2-1; i++) {
            if(input.charAt(i)!=input.charAt(input.length()-i-1)) System.out.println("riddy");return;}
        System.out.println("palindrome");
    }
}