import java.io.*; import java.util.*; public class JavaStringReverse { public static void main(String[] args) { Scanner sc = new Scanner(System.in); String A = sc.next(); int l = A.length(); boolean ispallin = true; for (int i = 0; i < l / 2; i++) { if (A.charAt(i) != A.charAt(l - 1 - i)) ispallin = false; } System.out.println(ispallin ? "Yes" : "No"); } }