import sys
input = lambda :sys.stdin.readline()[:-1]
ni = lambda :int(input())
na = lambda :list(map(int,input().split()))
yes = lambda :print("yes");Yes = lambda :print("Yes");YES = lambda : print("YES")
no = lambda :print("no");No = lambda :print("No");NO = lambda : print("NO")
#######################################################################
c = [["gray","brown","green","cyan","blue","yellow","orange","red"],
["gray","green","blue","yellow","red"],
["gray","green","cyan","blue","violet","orange","red"]]
s = input().split()

from itertools import permutations

n = 3
ans = set()
for p in permutations(range(n), n):
    if all(s[p[i]] in c[i] for i in range(n)):
        ans.add(tuple([s[p[i]] for i in range(n)]))

# print(ans)
if len(ans) == 1:
    Yes()
else:
    No()