cs = ["Red", "Orange", "Yellow", "Green", "Cyan", "Blue", "Violet"]
cnt = {cs[i]: 0 for i in range(7)}

N = int(input())
A = list(input().split())
B = list(input().split())

for i in range(N - 1):
    cnt[A[i]] += 1
    cnt[B[i]] -= 1
cnt[A[N - 1]] += 1

for c in cs:
    if cnt[c] > 0:
        print(c)