#include<bits/stdc++.h>
using namespace std;
class rectangle{
private:
int length,width;
public:
void set(int x,int y){
length=x;
width=y;
}
int getlength(){
return length;
}
int getwidth(){
return width;
}
int area(){
return length*width;
}
string cancover(rectangle a){
if(this->area()>=a.area()){
return "yes";
}
else{
return "no";
}
}
// write your code here......
};
int main(){
int l1,w1,l2,w2;
cin>>l1>>w1>>l2>>w2;
rectangle a,b;
a.set(l1,w1);
b.set(l2,w2);
cout<<a.cancover(b);
return 0;
}