import java.util.*;

public class Solution {

    static String spr(String a) {
        int n = a.length();
        for (int i = 0; i < n/2; ++i) {
            if (a.charAt(i) != a.charAt(n-1-i))
            	return "No";
        }
        return "Yes";
    }

    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        String s = sc.next();
        System.out.println(spr(s));
        sc.close();
    }
}