S = [input() for _ in range(3)]

a = "#"
b = "."

import sys
flag = True
for i in range(3):
    for j in range(3):
        if (i + j) % 2 == 0:
            if S[i][j] != a:
                flag = False
        else:
            if S[i][j] != b:
                flag = False
if flag:
    print('Yes')
flag = True
for i in range(3):
    for j in range(3):
        if (i + j) % 2 == 0:
            if S[i][j] != b:
                flag = False
        else:
            if S[i][j] != a:
                flag = False
if flag:
    print('Yes')
else:
    print('No')