#include < iostream >
using namespace std;
signed main(){
int a,b,c,d;
cin >> a >> b >> c >> d;
a - 1 >= c && b - 1 >= d ? cout << "Yes" : cout << "No";
}
#include < iostream >
using namespace std;
signed main(){
int a,b,c,d;
cin >> a >> b >> c >> d;
a - 1 >= c && b - 1 >= d ? cout << "Yes" : cout << "No";
}