S=['gray','brown','green','cyan','blue','yellow','orange','red']
T=['gray','green','blue','yellow','red']
U=['gray','green','cyan','blue','violet','orange','red']

a,b,c=input().split()
B=sorted([a,b,c])
B=tuple(B)
D={}
for s in S:
  for t in T:
    for u in U:
      A=sorted([s,t,u])
      A=tuple(A)
      if A not in D:
        D[A]=0
      D[A]+=1 

if B not in D:
  print('No')
elif D[B]==1:
  print('Yes')
else:
  print('No')