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

if s1[0] == s1[1] or s1[1] == s1[2]:
  print("No")
  exit()

for a, b, c in zip(list(s1), list(s2), list(s3)):
  if a == b or b == c:
    print("No")
    exit()

print("Yes")