题解 | #牛牛的金币#

x,y = map (int,input().split())
x1,y1 = map(int,input().split())
y2 = y1-y
x2 = x1-x
if (x2,y2)==(0,1):
    print("u")
if (x2,y2)==(0,-1):
    print("d")
if (x2,y2)==(1,0):
    print("r")
if (x2,y2)==(-1,0):
    print("l")