题解 | #牛牛的金币#
牛牛的金币
http://www.nowcoder.com/practice/35d8e3e569dc49f2a1018d1dc9186998
niu = input().split()
jin = input().split()
x, y = map(lambda x, y:int(y)-int(x), niu, jin)
if x > 0:
print("r")
elif x < 0:
print("l")
elif y > 0:
print("u")
elif y < 0:
print("d")
