题解 | #牛牛的金币#
牛牛的金币
https://www.nowcoder.com/practice/35d8e3e569dc49f2a1018d1dc9186998
x, y = map(int, input().split())
x1, y1 = map(int, input().split())
if x == x1:
if(y - y1) == 1:
print("d")
else:
print("u")
else:
if(x - x1) == 1:
print("l")
else:
print("r")


