import java.util.*;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        char[] n = sc.next().toCharArray();
        char[] m = sc.next().toCharArray();
        boolean isNEv = ((n[n.length - 1] - '0') % 2 == 0);
        boolean isMEv = ((m[m.length - 1] - '0') % 2 == 0);
        int mLength = m.length;
        if ((isNEv && isMEv) || (!isNEv && isMEv && mLength > 1)) {
            System.out.println("Yes");
        } else {
            System.out.println("No");
        }
    }
}