题解 | #牛牛的金币#
牛牛的金币
http://www.nowcoder.com/practice/35d8e3e569dc49f2a1018d1dc9186998
a, b = map(int, input().split()) c, d = map(int, input().split()) e, f = c - a, d - b if f == 1: print('u') elif f == -1: print('d') else: if e == 1: print('r') elif e == -1: print('l')
