s = [list(input()) for _ in range(3)]
ans = "No"
a,b = True,True
for i in range(3):
    for j in range(3):
        if (i+j) & 1:
            a &= s[i][j] == "."
            b &= s[i][j] == "#"
        else:
            b &= s[i][j] == "."
            a &= s[i][j] == "#"
if a or b:
    ans = "Yes"
print(ans)