コードテスト8回

package main;

import java.util.Scanner;


public class Main {

	public String solu(String a) {
    
		 String b	= a.toUpperCase();
		 String c = b.trim();
		 char s [] = c.toCharArray();
	
		for(int i = 0; i< s.length; i ++) {
			
			if(!Character.isAlphabetic(s[i])) {
				s[i] = ' ';
			}
		}
		
		
		String d = String.valueOf(s).trim();
		
		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));

	}
	
	
	

	
	}