s1,s2,s3 = map(str, input().split())
s = [s1,s2,s3]
if len(set(s)) == 1:
    print("Yes")
    exit()
a=[{"gray","brown","green","cyan","blue","yellow","orange","red"},
{"gray","green","blue","yellow","red"},
{"gray","green","cyan","blue","violet","orange","red"}]
while len(a) > 0:
    b = False
    for si in s:
        c = 0
        for ai in a:
            if si in ai:
                c += 1
        if c==1:
            for ai in a:
                if si in ai:
                    s.remove(si)
                    a.remove(ai)
                    break
            b = True
            break
    if not b:
        break
if len(a) == 0 or len(set(s)) == 1:
    print("Yes")
else:
    print("No")