import java.util.*;
public class Main{
  public static void main(String[] args){
    Scanner sc=new Scanner(System.in);
    String line;
    line=sc.nextLine();
    int n=Integer.parseInt(line);
    line=sc.nextLine();
    int m=Integer.parseInt(line);
    n+=m/10;
    if(n%2==0){
      System.out.println("yes");
    }else{
      System.out.println("no");
    }
  }
}