#include <bits/stdc++.h>
using namespace std;

int main(){
  int a,b,c,d;
  cin>>a>>b>>c>>d;
  if(a*b%2==1 && (c+d)%2==1){
    cout<<"No"<<endl;
  }else{
    cout<<"Yes"<<endl;
  }
 
  return 0;
}
   
  
	
	  
	  
	  
	  
	  
	  
     
  
  
  
  
  

  

 
  


 

    
  

