#include <bits/stdc++.h>
using namespace std;
int N = 8;
std::vector A(N, vector(N, 0));
bool OK(int id = 0) {
	if (id == N) {
		bool ok = true;
		for (int i = 0; i < N; i ++) {
			int s = A[0][i];
			for (int j = 1; j < N; j ++) {
				s -= A[j][i];
			}
			ok = ok && (s == 0);
		}
		return ok;
	}
	for (int a = 0; a < N; a ++) {
		if (OK(id+1)) {
			return true;
		}
		for (int i = 1; i < N; i ++) {
			swap(A[id][i], A[id][i-1]);
		}
	}
	return false;
}
int main () {
	for (auto& a : A) {
		for (auto& b : a) {
			char c;
			cin >> c;
			b = c - '0';
		}
	}
	cout << (OK() ? "Yes" : "No") << endl;
}