from itertools import permutations

coders = [
    ["gray","brown","green","cyan","blue","yellow","orange","red"],
    ["gray","green","blue","yellow","red"],
    ["gray","green","cyan","blue","violet","orange","red"]
]

S = input().split()
cnt = 0

for perm in set(permutations(S)):
    if all(s in coders[i] for i, s in enumerate(perm)):
        cnt += 1

print("Yes" if cnt == 1 else "No")