#include <bits/stdc++.h>
using namespace std;
using ll = long long;

const ll N = 1e6 + 1;
const ll M = 1e9 + 7;

mt19937_64 rng(static_cast<ll>(std::chrono::duration_cast<std::chrono::nanoseconds>(std::chrono::high_resolution_clock::now().time_since_epoch()).count()));

ll rand(ll l, ll r) {
    return uniform_int_distribution<ll>(l, r)(rng);
}

string P = "BRKBNQRN";
string Q = "KNNBBRRQ";
string S[5];
ll T[] = {(ll)100, (ll)300, (ll)1500, (ll)10000};
vector<string> v, res;
ll val[N];

ll cal(string &s, string &t) {
    ll res = 0;
    for (int i = 0; i <= 7; i ++)
        if (s[i] == t[i]) res ++;
    return res;
}

ll check(ll x) {
    return x >= 4;
}

void doTest(ll testID) {
    while (true) {
        bool nxt = 0;
        string tmp; cin >> tmp;
        if (tmp == "END") return;
        cin >> tmp;

        res.clear();
        for (auto x: v) res.push_back(x);

        /* BEGIN MESS 1*/
        for (int i = 0; i <= 0; i ++) {
            ll cnt = -1, tmp = 0;
            for (int j = 0; j < T[i]; j ++) {
                string cur = res[rand(0, res.size() - 1)]; tmp = 0;
                for (auto y: res) tmp += check(cal(cur, y));
                if (tmp > cnt) {cnt = tmp; S[i] = cur;}
            }
            cout << S[i] << endl; 
            cin >> val[i]; if (val[i] == 8) {nxt = 1; break;}

            vector<string> newRes;
            for (auto x: res) if (cal(x, S[i]) == val[i]) newRes.push_back(x);
            res = newRes;
            // cout << "Debug: " << res.size() << endl;
        }
        if (nxt) continue;

        /* BEGIN MESS 2*/
        for (int i = 1; i <= 3; i ++) {
            ll cnt = 0, tmp = 0;
            for (int j = 0; j < T[i]; j ++) {
                string cur = res[rand(0, res.size() - 1)];
                set<ll> s; for (auto y: res) s.insert(cal(cur, y));
                if (s.size() > cnt) {cnt = s.size(); S[i] = cur;}
            }
            cout << S[i] << endl; 
            cin >> val[i]; if (val[i] == 8) {nxt = 1; break;}
            
            vector<string> newRes;
            for (auto x: res) if (cal(x, S[i]) == val[i]) newRes.push_back(x);
            res = newRes;
            // cout << "Debug: " << res.size() << endl;
        }
        if (nxt) continue;

        /* BEGIN MESS 3*/
        for (int i = 4; i <= 4; i ++) {
            ll cnt = 0;
            for (auto x: v) {
                set<ll> s; for (auto y: res) s.insert(cal(x, y));
                if (s.size() > cnt) {cnt = s.size(); S[4] = x;}
            }
            cout << S[i] << endl; 
            cin >> val[i]; if (val[i] == 8) {nxt = 1; break;}
            
            vector<string> newRes;
            for (auto x: res) if (cal(x, S[i]) == val[i]) newRes.push_back(x);
            res = newRes;
        }
        if (nxt) break;

        /*BEGIN MESS 4*/
        // cout << "??? " << res.size() << endl;
        cout << res[0] << endl;
        cin >> val[5];
    }
}

signed main() {    
    // freopen("a.inp", "r", stdin);
    // freopen("a.out", "w", stdout);

    set<string> s;
    string T = "KNNBBRRQ";
    sort(T.begin(), T.end());
    do {
        vector<ll> b, r, k;
        for (int i = 0; i <= 7; i ++) if (T[i] == 'B') b.push_back(i);
        for (int i = 0; i <= 7; i ++) if (T[i] == 'K') k.push_back(i);
        for (int i = 0; i <= 7; i ++) if (T[i] == 'R') r.push_back(i);
        if ((b[1] - b[0]) % 2 == 0) continue;
        if (r[0] > k[0] || r[1] < k[0]) continue;
        s.insert(T);
    } while(next_permutation(T.begin(), T.end()));
    for (auto x: s) v.push_back(x);

    ios_base::sync_with_stdio(0); cin.tie(0);

    int test = 1; 
    // cin >> test;
    for (int _ = 1; _ <= test; _ ++) doTest(test);
}