#include <bits/stdc++.h>
using namespace std;

#ifdef _RUTHEN
#include "debug.hpp"
#else
#define show(...) true
#endif

using ll = long long;
#define rep(i, n) for (int i = 0; i < (n); i++)
template <class T> using V = vector<T>;

int main() {
    ios::sync_with_stdio(false);
    cin.tie(0);
    V<string> S(3);
    rep(i, 3) cin >> S[i];
    rep(k, 2) {
        bool ok = 1;
        rep(i, 3) {
            rep(j, 3) {
                int c = S[i][j] == '#';
                if ((c + i + j) % 2 != k) ok = 0;
            }
        }
        if (ok) {
            cout << "Yes" << '\n';
            return 0;
        }
    }
    cout << "No" << '\n';
    return 0;
}