import sys
input = sys.stdin.readline

from itertools import permutations

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

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

L=list(permutations(S))

ANS=set()

for x,y,z in L:
    if x in A[0] and y in A[1] and z in A[2]:
        ANS.add((x,y,z))

if len(ANS)==1:
    print("Yes")
else:
    print("No")