s1 = input()
s2 = input()
s3 = input()

for i,v in enumerate(s1):
    if i == 0:
        continue
    if s1[i-1] == v:
        print("No")
        exit()

for i,v in enumerate(s2):
    if i == 0:
        continue
    if s2[i-1] == v:
        print("No")
        exit()

for i,v in enumerate(s3):
    if i == 0:
        continue
    if s3[i-1] == v:
        print("No")
        exit()

for i in range(3):
    if s1[i] == s2[i] or s2[i] == s3[i]:
        print("No")
        exit()

print("Yes")