#include <bits/stdc++.h>
#define ll int
using namespace std;
vector<string> v;
vector<pair<string,ll> > S;
set<string> cor;
string Get_Min()
{
    ll maxx=INT_MAX;
    string ans;
    set<string> ss;
    for (auto j : cor)
    {
        for (auto i : S)
        {
            ll d=0;
            for (ll p=0;p<8;p++)
                d+=(i.first[p]!=j[p]);
            if (d!=i.second)
            {
                ss.insert(j);
                break;
            }
        }
    }
    for (auto i : ss)
        cor.erase(i);
    ll cnt[10]={0},cur=0,diff;
    for (auto i : cor)
    {
        for (ll j=0;j<9;j++)
            cnt[j]=0;
        cur++;
        for (auto l : cor)
        {
            if (i==l)
                continue;
            diff=0;
            for (ll p=0;p<8;p++)
                diff+=(i[p]!=l[p]);
            cnt[diff]++;
            cur=max(cur,cnt[diff]);
        }
        if (cur<maxx)
        {
            ans=i;
            maxx=cur;
        }
    }
    return ans;
}
ll b,p,k,n,q,r;
void Create(string s)
{
    if ((ll)s.size()==8)
    {
        v.push_back(s);
        return;
    }
    string c=s;
    if (!b || (b==1 && p!=s.size()%2))
    {
        c+='B';
        b++;
        ll prev=p;
        p=s.size()%2;
        Create(c);
        p=prev;
        b--;
        c=s;
    }
    if (!k && r==1)
    {
        c+='K';
        k++;
        Create(c);
        k--;
        c=s;
    }
    if (n!=2)
    {
        c+='N';
        n++;
        Create(c);
        n--;
        c=s;
    }
    if (!q)
    {
        c+='Q';
        q++;
        Create(c);
        q--;
        c=s;
    }
    if (!r || (r==1 && k==1))
    {
        c+='R';
        r++;
        Create(c);
        r--;
    }
    return;
}
int main()
{
    string s="",x="";
    Create(s);
    ll a;
    while (true)
    {
        if (x=="")
            cin >> x;
        cin >> n;
        S.clear();
        for (auto i : v)
            cor.insert(i);
        s=Get_Min();
        while (true)
        {
            cout << s << "\n";
            cin >> a;
            a=8-a;
            if (!a)
            {
                cin >> x;
                if (x=="END")
                    return 0;
                break;
            }
            S.push_back({s,a});
            s=Get_Min();
        }
    }
    return 0;
}