[string] 회문 문자열

import java.util.*;
class Main {	
	public String solution(String str){
		String answer="YES";
		str=str.toUpperCase();
		int len=str.length();
		for(int i=0; i<len/2; i++){
			if(str.charAt(i)!=str.charAt(len-i-1)) answer="NO";
		}
		return answer;
	}

	public static void main(String[] args){
		Main T = new Main();
		Scanner kb = new Scanner(System.in);
		String str=kb.next();
		System.out.print(T.solution(str));
	}
}