코딩테스트7번

package main;

import java.util.Scanner;


public class Main {

	public String solu(String a) {
	
		char s [] = a.toCharArray();
	
		for(int i = 0; i< s.length/2; i ++) {
			
			
			if(s[i] != s[s.length-i-1]) {
				
				return "NO";
				
			}
			
			
			}
		return "YES";

			}
		
	
		
		
	
	
	
	public static void main(String[] args) {
		
	
	
	Main main = new Main();
	
	Scanner scan = new Scanner(System.in);
	
	String a = scan.nextLine();
	
	
	main.solu(a);
	System.out.println(main.solu(a));

	}
	
	
	

	// -> qweewq -> return "YES";
    // ->QWEQWE -> return "NO";
	}