import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		int g = n % 10;
		int b = n / 100;
		if(g == b){
			System.out.println("Y");
		}else{
			System.out.println("N");
		}
	}

}
/**************************************************************
	Problem: 1628
	User: admin
	Language: Java
	Result: Accepted
	Time:678 ms
	Memory:40264 kb
****************************************************************/