#include<bits/stdc++.h>

using namespace std;

using ll = long long;
using ld = long double;
using ull = unsigned long long;

using pii = pair<int, int>;
using pll = pair<ll, ll>;
using pld = pair<ld, ld>;

#define fi first
#define se second
#define left BAO
#define right ANH
#define pb push_back
#define pf push_front
#define mp make_pair
#define ins insert
#define btpc __builtin_popcount
#define btclz __builtin_clz

#define sz(x) (int)(x.size());
#define all(x) x.begin(), x.end()
#define debug(...) " [" << #__VA_ARGS__ ": " << (__VA_ARGS__) << "] "

mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());

int d4x[4] = {1, 0, -1, 0}; int d4y[4] = {0, 1, 0, -1};
int d8x[8] = {0, 1, 1, 1, 0, -1, -1, -1};
int d8y[8] = {1, 1, 0, -1, -1, -1, 0, 1};

template<class X, class Y>
    bool minimize(X &x, const Y &y) {
        if (x > y)
        {
            x = y;
            return true;
        }
        return false;
    }
template<class X, class Y>
    bool maximize(X &x, const Y &y) {
        if (x < y)
        {
            x = y;
            return true;
        }
        return false;
    }

const int MOD = 1e9 + 7; //998244353

template<class X, class Y>
	void add(X &x, const Y &y) {
		x = (x + y);
		if(x >= MOD) x -= MOD;
	}

template<class X, class Y> 
	void sub(X &x, const Y &y) {
		x = (x - y);
		if(x < 0) x += MOD;
	}

/* Author : Le Ngoc Bao Anh, DUT, Da Nang */

const ll INF = 1e9;
const int N = 1e5 + 10;

int B[N];

void BaoJiaoPisu() {
	string a = "RQKBBNRN";

	vector<string> cand;

	sort(all(a));
	int sz = 8;

	do {
		bool ok = true;
		int G = 0, cnt = 0;
		for(int i = 0; i < 8; i++) {
			cnt += (a[i] == 'R');
			if(a[i] == 'K') ok &= (cnt == 1);
			if(a[i] == 'B') G += (i & 1);
		}
		ok &= (G == 1);
		if(ok) cand.pb(a);
	} while(next_permutation(all(a)));

	auto cnt = [&](string a, string b) -> int {
		int ans = 0;
		for(int i = 0; i < 8; i++) {
			ans += (a[i] == b[i]);
		}
		return ans;
	};

	auto get_opt = [&](vector<string> curr) -> string {
		string ans = "";
		int opt = INF;
		for(int i = 0; i < curr.size(); i++) {
			for(int j = 0; j <= 8; j++) B[j] = 0;
			int T = 0;
			for(int j = 0; j < curr.size(); j++) {
				++B[cnt(curr[i], curr[j])];
			}
			for(int j = 0; j <= 8; j++) maximize(T, B[j]);
			if(minimize(opt, T)) ans = curr[i];
		}
		return ans;
	};
	string root = get_opt(cand);

	while(true) {
		string s; cin >> s;
		if(s == "END") break;
		int x; cin >> x;
		vector<string> curr = cand;

		while(true) {
			string ask = (curr.size() == 960 ? root : get_opt(curr));
			cout << ask << endl;
			int x; cin >> x;
			if(x == 8) break;
			vector<string> ncurr;
			for(auto p : curr) {
				if(cnt(p, ask) == x) ncurr.pb(p);
			}
			curr = ncurr;
		}
	}
}

int main()
{
    ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
    #ifndef ONLINE_JUDGE
    // freopen("input.txt", "r", stdin);
    // freopen("output.txt", "w", stdout);
    #else 
    //online
    #endif

    int tc = 1, ddd = 0;
    // cin >> tc;
    while(tc--) {
        //ddd++;
        //cout << "Case #" << ddd << ": ";
        BaoJiaoPisu();
    }
}