#include <bits/stdc++.h>
#define ll int
using namespace std;
vector<string> v,startt[10],d[10],cur;
string ans;
string Get_Min()
{
    ll maxx=INT_MAX;
    string sol;
    for (string i : cur)
    {
        if (i==ans)
            continue;
        ll cnt[10]={0},m=0;
        for (string j : cur)
        {
            if (j==ans)
                continue;
            ll num=0;
            for (ll l=0;l<8;l++)
                num+=(i[l]!=j[l]);
            cnt[num]++;
            m=max(m,cnt[num]);
        }
        if (m<maxx)
        {
            maxx=m;
            sol=i;
        }
    }
    for (ll i=0;i<9;i++)
        d[i].clear();
    for (string i : cur)
    {
        ll num=0;
        for (ll l=0;l<8;l++)
            num+=(i[l]!=sol[l]);
        d[num].push_back(i);
    }
    return sol;
}
void Solve(ll a)
{
    cur=d[a];
    ans=Get_Min();
}
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="",ans0="NRBBNKQR";
    Create();
    ll a;
    for (auto i : v)
    {
        ll cnt=0;
        for (ll j=0;j<8;j++)
            cnt+=(ans0[j]!=i[j]);
        startt[cnt].push_back(i);
    }
    while (true)
    {
        if (x=="")
            cin >> x;
        cin >> n;
        ans=ans0;
        for (ll i=0;i<9;i++)
            d[i]=startt[i];
        while (true)
        {
            cout << ans << "\n";
            cin >> a;
            a=8-a;
            if (!a)
            {
                cin >> x;
                if (x=="END")
                    return 0;
                break;
            }
            Solve(a);
        }
    }
    return 0;
}