import java.util.Scanner;
public class second
{
	public static void main(String[] args)
	{
		Scanner scan=new Scanner(System.in);
		String a;
		int flag=0;
		System.out.println("Entry string:");
		a=scan.next();
		for(int i=0;i<a.length()-1;i++)
		{
			if(a.charAt(i)!=a.charAt(a.length()-i-1))
			{
				flag=1;
				break;
			}
		}
		if(flag==0)
		{
			System.out.println("Yes!");
		}
		else
		{
			System.out.println("No!!!");
		}
		
	}
}