import java.io.*;
import java.util.*;

public class Solution {

    public static void main(String[] args) {
        
        Scanner sc=new Scanner(System.in);
        String A=sc.next();
        for(int i=0;i<=A.length()/2;i++){
            if(A.charAt(i)==A.charAt(A.length()-1-i)){
                if(i==A.length()/2){
                    System.out.println("Yes");}
            }
            else{
                System.out.println("No");
                break;
            } 
        }
        
    }
}


add StringReverse.java