import sys,random,bisect
from collections import deque,defaultdict
from heapq import heapify,heappop,heappush
from itertools import permutations
from math import gcd,log

input = lambda :sys.stdin.readline().rstrip()
mi = lambda :map(int,input().split())
li = lambda :list(mi())

T = "RDRDRDRDUDULUDULULUL"

K = int(input())
Q = K//len(T) + 10
S = T * Q
S = S[:K]
print(S)