mod = 998244353


def main():
    import sys
    input = sys.stdin.readline

    S0 = "DDDR"
    S1 = "RRRUUULLLLDDDRUD"
    L1 = len(S1)

    N = int(input())
    if N <= 4:
        print(S0[:N])
    else:
        T = [S0]
        for i in range(N - 4):
            T.append(S1[i % L1])
        print("".join(T))


if __name__ == '__main__':
    main()