T = int(input())

if T < 4:
    # Handle cases where there's no ghost appearance
    sample = "DRU"  # Valid for T=3; adjust if needed for T=1, 2
    print(sample[:T])
else:
    s = ['R', 'D', 'R', 'D']
    remaining = T - 4
    patterns = ['RURU', 'LDLD']
    pattern_idx = 0
    while remaining > 0:
        current_pattern = patterns[pattern_idx % 2]
        take = min(remaining, len(current_pattern))
        for c in current_pattern[:take]:
            s.append(c)
        remaining -= take
        pattern_idx += 1
    print(''.join(s))