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