//https://qoj.ac/contest/1356/problem/7179
#include <bits/stdc++.h>
#include <random>
using namespace std;
 
typedef long long ll;
typedef long double ld;
typedef pair<int,int> pi;
typedef vector<int> vi; 
typedef vector<pi> vpi;

#define mp make_pair
#define f first
#define s second
#define sz(x) (int)x.size()
#define all(x) begin(x), end(x)
#define rsz resize
#define bk back()
#define pb push_back

#define FOR(i,a,b) for (int i = (a); i < (b); ++i)
#define For(i,a) FOR(i,0,a)
#define ROF(i,a,b) for (int i = (b)-1; i >= (a); --i)
#define Rof(i,a) ROF(i,0,a)
#define trav(a,x) for (auto& a: x)

const int MOD = 1e9+7;
const ld PI = acos((ld)-1);
mt19937 rng; // or mt19937_64
template<class T> bool ckmin(T& a, const T& b) { 
	return b < a ? a = b, 1 : 0; }

void DBG() { cerr << "]" << endl; }
template<class H, class... T> void DBG(H h, T... t) {
	cerr << h; if (sizeof...(t)) cerr << ", ";
	DBG(t...); }
#ifdef LOCAL // compile with -DLOCAL
#define dbg(...) cerr << "LINE(" << __LINE__ << ") -> [" << #__VA_ARGS__ << "]: [", DBG(__VA_ARGS__)
#else
#define dbg(...) 0
#endif

set<vi> totStates;
map<int, char> M = {{0,'R'}, {1,'B'}, {2,'N'}, {3,'K'}, {4,'Q'}};

string ts(vi v) {
	string ret = "";
	trav(x,v) {
		ret += M[x];
	}
	return ret;
}
int diffs(vi a, vi b) {
	int cnt = 0;
	For(i,8)if(a[i]==b[i]) cnt++;
	return cnt;
}
void solve() {
	vector<vi> cur;
	trav(x,totStates)cur.pb(x);

	For(i,6) {
		if(sz(cur)==0) {
			dbg("ERR");
			return;
		}
		if(sz(cur)==1) {
			dbg("CORRECT");
		}
		vi tmp = cur[rng()%sz(cur)];
		
		if(i>=4 && sz(cur) <= 8) {
			trav(x,cur) {
				set<int> tmps;
				trav(y,cur) tmps.insert(diffs(y,x));
				if(sz(tmps)==sz(cur)) {
					dbg("OK");
					tmp = x;
				}
			}
		}

		cout << ts(tmp) << endl;
		int x; cin>>x;
		if(x==8) {
			return;
		}
		vector<vi> news;
		trav(y,cur) if(diffs(y,tmp)==x) {
			news.pb(y);
		}
		cur = news;	 
			
		
		
	}
	assert(-1);
}

int main() {
	ios_base::sync_with_stdio(0); cin.tie(0); 
	vi v = {0,0,1,1,2,2,3,4};
	while(next_permutation(all(v))) {
		int L =-1, R=-1, M=-1;
		For(i,8) if(v[i]==0) {
			L=i;
			break;
		}
		Rof(i,8) if(v[i]==0) {
			R=i;
			break;
		}
		For(i,8) if(v[i]==3) {
			M=i;
			break;
		}
		if(M<L || M>R) continue;
		vi v2;
		For(i,8)if(v[i]==1) {
			v2.pb(i%2);
		}
		assert(sz(v2)==2);
		if((v2[0]^v2[1])==0) continue;
		totStates.insert(v);
	}
	// cout <<sz(totStates) << endl;
	// trav(x,totStates) {
	// 	cout << ts(x) << endl;
	// }
	assert(sz(totStates) == 960);
	while(true) {
		string S;
		getline(cin,S);
		if(S=="END") {
			break;
		}
		solve();
		getline(cin,S);
	}
}


/* stuff you should look for
	* int overflow, array bounds
	* special cases (n=1?)
	* do smth instead of nothing and stay organized
	* WRITE STUFF DOWN
*/