import java.util.*;

public class Main{
    @SuppressWarnings("ConvertToTryWithResources")
    public static int  pow(int a,int b){
        int res=1;
        while (b>0){
            if (b%2==1){
                res*=a;
            }
            a*=a;b>>=1;
        }
        return res;
    }
    public static int pow(int a,int b,int mod){
        int res=1;
        while (b>1){
            if (b%2==1){
                res=res*a%mod;
            }
            a=a*a%mod;b>>=1;
        }
        return res;
    }
    public static void main(String[] args){
        Scanner sc=new Scanner(System.in);
        String n,m;
        n=sc.next();m=sc.next();
        int a,b;
        a=n.length();b=m.length();
        int[] x=new int[a];int[] y=new int [b];
        for (int i=0;i<a;i++){
            x[i]=n.charAt(i)-'0';
        }
        for (int i=0;i<b;i++){
            y[i]=m.charAt(i)-'0';
        }
        String ans="Yes";
        if (x[a-1]%2==1){
            if (b==1 || y[b-1]%2==1){
                ans="No";
            }
        } else {
            if (y[b-1]%2==1){
                ans="No";
            }
        }
        System.out.println(ans);
        sc.close();
    }
}