#include <bits/stdc++.h>
#include <atcoder/all>
using namespace std;
using namespace atcoder;
//const long nPrime = 1000000007;
//const long nPrime = 998244353;
typedef long long ll;
int main() {
    vector<vector<ll>> vviNum(3,vector<ll>(3,0));
    for(ll i = 0; i < 3; i++){
        string s;
        cin >> s;
        for(ll j = 0; j < 3; j++){
            if(s[j] == '#'){
                vviNum[i][j] = 1;
            }
        }
    }
    for(ll i = 0; i < 2; i++){
        for(ll j = 0; j < 3; j++){
            if(vviNum[i][j] == vviNum[i+1][j]){
                cout << "No" <<endl;
                return 0;
            }
            if(vviNum[j][i] == vviNum[j][i+1]){
                cout << "No" <<endl;
                return 0;
            }
        }
    }
    
    cout << "Yes" <<endl;
    return 0;
}