T = int(input())
if T == 3:
    print("DRU")
else:
    s = 'RDRDRURUL'
    if T <= len(s):
        print(s[:T])
    else:
        cycle = 'RDRDRURUL'
        cycle_length = len(cycle)
        base = cycle * (T // cycle_length + 1)
        print(base[:T])