//*** Bismillah ***//
#pragma GCC optimize("O3")
#pragma GCC optimize("fast-math")
#pragma GCC optimize("unroll-loops")
#pragma GCC optimize("no-stack-protector")
#include <bits/stdc++.h>
using namespace std;
#if !defined(ONLINE_JUDGE) and !defined(EVAL)
#include "template/debug.h"
#else
#define d(x...)
#endif
#define fr first
#define sc second
#define in insert
#define ll long long
#define pb push_back
#define vll vector<ll>
#define pll pair<ll,ll>
#define vvll vector<vll>
#define vpll vector<pll>
#define len(x)(ll)x.size()
#define all(x)x.begin(),x.end()
const ll INF = 1e9;
const ll INFL = 1e18;
const ll MOD = 1e9+7;
// const ll MOD = 998244353;
const ll maxn = 2e5+5;
ll n,m,k=0;
#include "combo.h"
map<string, ll>mp;
ll get(string s){
if(mp.count(s)) return mp[s];
return mp[s] = press(s);
}
string guess_sequence(int N){ n = N;
string s;
array<string, 3>ch;
if(get("AB")){
if(get("A")) s = "A", ch = {"B", "X", "Y"};
else s = "B", ch = {"A", "X", "Y"};
}
else{
if(get("X")) s = "X", ch = {"A", "B", "Y"};
else s = "Y", ch = {"A", "B", "X"};
}
// XABY
for(ll i = 2; i < n; i ++){
string tmp = s + ch[0] + // ya len(s) + 1
s + ch[1] + ch[0] + // ya len(s) + 2
s + ch[1] + ch[1] +
s + ch[1] + ch[2];
// ya da len(s) olacaq
if(get(tmp) == len(s) + 1) s = s + ch[0];
else if(get(tmp) == len(s) + 2) s = s + ch[1];
else if(get(tmp) == len(s)) s = s + ch[2];
}
if(len(s) == n) return s;
if(get(s + ch[0]) == n) return s + ch[0];
if(get(s + ch[1]) == n) return s + ch[1];
return s + ch[2];
}
// void _(ll tt){
// }
// signed main(){
// ll tm=clock();
// cin.tie(0)->sync_with_stdio(0);
// ll t=1;
// cin>>t;
// for(ll tt=1;tt<=t;tt++){
// _(tt);
// }
// cerr<<"\n\033[1;31mTime: \033[1;30m" \
// <<(double)(clock()-tm)/1000000<<"\033[1;32m seconds\n";
// }
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