Mr. West bought a new car! So he is travelling around the city.
One day he comes to a vertical corner. The street he is currently in has a width x, the street he wants to turn to has a width y. The car has a length l and a width d.
Can Mr. West go across the corner?
输入解释
Every line has four real numbers, x, y, l and w. Proceed to the end of file.
输出解释
If he can go across the corner, print "yes". Print "no" otherwise.