from itertools import*
a='gray','brown','green','cyan','blue','yellow','orange','red'
b='gray','green','blue','yellow','red'
c='gray','green','cyan','blue','violet','orange','red'
s1,s2,s3=input().split()
f=set()
for s in permutations([s1,s2,s3]):
  if s[0]in a and s[1]in b and s[2]in c:
    f|={s}
if len(f)==1:
  print('Yes')
else:
  print('No')