#include <iostream>
#include <string>
#include <vector>
#include <cstring>
#include <algorithm>
using namespace std;

vector<vector<int> > rot = {
	{0,1,2,3,4,5}, {0,2,4,1,3,5}, {0,4,3,2,1,5}, {0,3,1,4,2,5},
	{1,5,2,3,0,4}, {1,2,0,5,3,4}, {1,0,3,2,5,4}, {1,3,5,0,2,4},
	{2,5,4,1,0,3}, {2,4,0,5,1,3}, {2,0,1,4,5,3}, {2,1,5,0,4,3},
	{3,4,5,0,1,2}, {3,5,1,4,0,2}, {3,1,0,5,4,2}, {3,0,4,1,5,2},
	{4,0,2,3,5,1}, {4,2,5,0,3,1}, {4,5,3,2,0,1}, {4,3,0,5,2,1},
	{5,4,2,3,1,0}, {5,2,1,4,3,0}, {5,1,3,2,4,0}, {5,3,4,1,2,0}
};

vector<vector<vector<int> > > cond = {
	{},
	{{3,0,2}},
	{{1,1,4}},
	{{1,0,4},{2,2,3}},
	{{0,3,5}},
	{{0,2,5},{3,4,2}},
	{{0,1,5},{4,5,1}},
	{{0,0,5},{2,6,3},{4,4,1}}
};

struct State { int id, r; };
State pz[8];

string dice[8];
bool used[8];

inline char toggleCase(char c) {
	if (islower(c)) return toupper(c);
	return tolower(c);
}

string solve(int x) {
	if (x == 8) return "YES";
	for (int i=1; i<8; ++i) {
		if (used[i]) continue;
		for (int j=0; j<24; ++j) {
			pz[x].id = i;
			pz[x].r = j;
			bool ok = true;
			for (int k=0; k<(int)cond[x].size(); ++k) {
				int bloc1 = x;
				int face1 = rot[pz[bloc1].r][cond[x][k][0]];
				int bloc2 = cond[x][k][1];
				int face2 = rot[pz[bloc2].r][cond[x][k][2]];
				if (toggleCase(dice[pz[bloc1].id][face1]) != dice[pz[bloc2].id][face2]) {
					ok = false; break;
				}
			}
			if (ok) {
				used[i] = true;
				if (solve(x+1) == "YES") return "YES";
				used[i] = false;
			}
		}
	}
	return "NO";
}

int main() {
	while (cin >> dice[0], dice[0] != "0") {
		for (int i=1; i<8; ++i) cin >> dice[i];
		sort(dice, dice+8);
		memset(used, false, sizeof used);
		used[0] = true;
		pz[0].id = 0;
		string res = "NO";
		for (int i=0; i<24; ++i) {
			pz[0].r = i;
			if (solve(1) == "YES") {
				res = "YES"; break;
			}
		}
		cout << res << endl;
	}
	return 0;
}