from itertools import permutations

S = list(input().split())

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

cnt = 0
for perm in permutations(range(3)):
    for i in range(3):
        if S[i] not in A[perm[i]]:
            break
    else:
        cnt += 1

if S.count(S[0]) == 3:
    print("Yes" if cnt == 6 else "No")
elif S.count(S[0]) == 2 or S.count(S[1]) == 2:
    print("Yes" if cnt == 2 else "No")
else:
    print("Yes" if cnt == 1 else "No")