// #pragma GCC optimize("Ofast,no-stack-protector,unroll-loops",                  \
//                      "omit-frame-pointer", "inline")
// #pragma GCC target(                                                            \
//     "sse,sse2,sse3,ssse3,sse4,sse4.1,sse4.2,popcnt,abm,mmx,avx,avx2,fma,tune=native")
// #pragma GCC option("arch=native", "no-zero-upper") // Enable AVX

/// UH Top
#include <bits/stdc++.h>
#define db(x)   cerr << #x << ':' << (x) << '\n';
#define all(v)  (v).begin(), (v).end()
#define allr(v) (v).rbegin(), (v).rend()
// #define int ll
using namespace std;
typedef long long ll;
typedef unsigned long long ull;
typedef long double ld;
// typedef __int128_t int128;
typedef pair<ll, ll> pii;
typedef pair<ld, ll> pdi;
typedef pair<ld, ld> pdd;
typedef pair<ld, pdd> pdp;
typedef pair<string, ll> psi;
typedef pair<ll, string> pls;
typedef pair<string, string> pss;
typedef pair<ll, pii> pip;
typedef pair<pii, pii> ppp;
typedef complex<ld> point;
typedef vector<point> polygon;
typedef vector<ll> vi;
typedef pair<point, int> ppi;
#define prec(n)                                                                \
	cout.precision(n);                                                         \
	cout << fixed
const ll mod = (1e9 + 7);
const ld eps = (1e-9);
const ll oo = (ll)(1e9 + 5);
#define pi   acos(-1)
#define MAXN (ll)(1e6 + 5)

vector<string> gen() {
	vector<int> av;
	for (int i = 0; i < 8; i++)
		av.push_back(i);
	vector<pii> bb;
	for (int i = 0; i < 8; i += 2)
		for (int j = 1; j < 8; j += 2)
			bb.push_back(pii(i, j));

	vector<pip> rkr;
	for (int i = 0; i < 6; i++)
		for (int j = i + 1; j < 6; j++)
			for (int k = j + 1; k < 6; k++)
				rkr.push_back(pip(i, pii(j, k)));

	// cout << bb.size() << ' ' << rkr.size() << "\n";
	string sssss = "RKR";
	vector<string> rem = {"QNN", "NQN", "NNQ"};
	vector<string> ans;
	for (auto b : bb){
		for (auto p : rkr) {
			vector<int> nav;
			string x(8, ' ');
			for (int i = 0; i < 8; i++) {
				if (i != b.first && i != b.second) {
					nav.push_back(i);
				} else {
					x[i] = 'B';
				}
			}
			// cout << nav.size() << "\n";
			// cout << p.first << ' ' << p.second.first << ' ' << p.second.second << "\n";
			vector<int> nnav;
			int cont = 0;
			for (int i = 0; i < 6; i++) {
				int pos = nav[i];
				// cout << nav[i] << "\n";
				if (i != p.first && i != p.second.first &&
				    i != p.second.second) {
					nnav.push_back(pos);
				} else {
					x[pos] = sssss[cont];
					cont++;
					// cout << pos << ' ' << cont << "\n";
				}
			}
			for (int j = 0; j < 3; j++) {
				for (int i = 0; i < 3; i++) {
					x[nnav[i]] = rem[j][i];
				}
				// cout << x << "\n";
				ans.push_back(x);
			}
			// break;
		}
		// break;
	}
	return ans;
}

int eqs[960][960];

int32_t main() {
	// ios_base::sync_with_stdio(0);
	// cin.tie(0);

	vector<string> ip = gen();
	// cout << ip.size() << "\n";
	int sz = 960;

	for (int i = 0; i < sz; i++)
		for (int j = 0; j < sz; j++)
			for (int k = 0; k < 8; k++)
				eqs[i][j] += (ip[i][k] == ip[j][k]);

	int best = 0;
	int cant = 960;
	for (int i = 0; i < 960; i++) {
		vector<int> f(9);
		for (int j = 0; j < 960; j++)
			f[eqs[i][j]]++;

		int ma = 0;
		for (int j = 0; j < 9; j++)
			ma = max(ma, f[j]);
		if (ma < cant) {
			cant = ma;
			best = i;
		}
	}

	auto ask = [&](int i) {
		cout << ip[i] << "\n";
		cout.flush();
		int r;
		cin >> r;
		return r;
	};

	vector<int> precs[9];
	for (int i = 0; i < 960; i++)
		precs[eqs[best][i]].push_back(i);

	// cout << best << "\n";

	string s;
	cin >> s;
	while (s != "END") {
		int _;
		cin >> _;
		int cant = ask(best);
		vector<int> act = precs[cant];
		while (cant != 8) {
			int best = 0;
			int cant = 960;
			for (int i = 0; i < 960; i++) {
				vector<int> f(9);
				for (auto p : act)
					f[eqs[i][p]]++;
				int ma = 0;
				for (int j = 0; j < 9; j++)
					ma = max(ma, f[j]);
				if (ma < cant) {
					cant = ma;
					best = i;
				}
			}

			vector<int> precs[9];
			for (auto i : act)
				precs[eqs[best][i]].push_back(i);

			cant = ask(best);
			act = precs[cant];
		}

		cin >> s;
	}

	return 0;
}