#include <bits/stdc++.h>
#define ll int
using namespace std;
vector<string> v;
vector<pair<string,ll> > S;
vector<string> cor,cor1;
ll cnt[10]={0},cur=0,diff,maxx;
string ans;
void Get_Min()
{
    maxx=INT_MAX;
    set<string> ss;
    for (auto i : cor)
    {
        bool yes=true;
        for (auto j : S)
        {
            ll num=0;
            for (ll p=0;p<8;p++)
                num+=(i[p]!=j.first[p]);
            if (num!=j.second)
                yes=false;
        }
        if (yes)
            cor1.push_back(i);
    }
    cor=cor1;
    cor1.clear();
    for (auto i : cor)
    {
        for (ll j=0;j<10;j++)
            cnt[j]=0;
        cur=0;
        for (auto l : cor)
        {
            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;
}
ll b,p,k,n,q,r,prevv;
string s;
void Create()
{
    if ((ll)s.size()==8)
    {
        v.push_back(s);
        return;
    }
    if (!b || (b==1 && p!=s.size()%2))
    {
        b++;
        prevv=p;
        p=s.size()%2;
        s+='B';
        Create();
        p=prevv;
        b--;
        s.pop_back();
    }
    if (!k && r==1)
    {
        s+='K';
        k++;
        Create();
        k--;
        s.pop_back();
    }
    if (n!=2)
    {
        s+='N';
        n++;
        Create();
        n--;
        s.pop_back();
    }
    if (!q)
    {
        s+='Q';
        q++;
        Create();
        q--;
        s.pop_back();
    }
    if (!r || (r==1 && k==1))
    {
        s+='R';
        r++;
        Create();
        r--;
        s.pop_back();
    }
    return;
}
int main()
{
    string x="";
    Create();
    ll a;
    cor=v;
    Get_Min();
    string xx=ans;
    while (true)
    {
        if (x=="")
            cin >> x;
        cin >> n;
        S.clear();
        cor=v;
        ans=xx;
        while (true)
        {
            cout << ans << "\n";
            fflush(stdout);
            cin >> a;
            a=8-a;
            if (!a)
            {
                cin >> x;
                if (x=="END")
                    return 0;
                break;
            }
            S.push_back({ans,a});
            Get_Min();
        }
    }
    return 0;
}