[String] 유효한 팰린드롬(replaceAll 정규식이용)

import java.util.*;
class Main {	
	public String solution(String s){
		String answer="NO";
		s=s.toUpperCase().replaceAll("[^A-Z]", "");
		String tmp=new StringBuilder(s).reverse().toString();
		if(s.equals(tmp)) answer="YES";
		return answer;
	}

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