#include<bits/stdc++.h>
#include<iostream>
#include "combo.h"
using namespace std;
#define ll long long
#define pb push_back
#define mp make_pair
#define pii pair<int,int>
#define vi vector<int>
#define mii map<int,int>
#define pqb priority_queue<int>
#define pqs priority_queue<int,vi,greater<int> >
#define mod 1000000007
#define inf 1e18
#define rep(x,s,e) for (auto x=s-(s>e);x!=e-(s>e);s<e?x++:x--)
#define w(x) int x; cin>>x; while(x--)
string s="";
string sf;
string guess_sequence(int n){
int cc=n;
int A=press("A");
int B=press("B");
int X=press("X");
if(A==1) s+="A";
else if(B==1) s+="B";
else if(X==1) s+="X";
else s+="Y";
int ss = s.size();
if(s=="A"){
while(ss!=cc){
sf=s[ss-1];
int c = press(sf+"B"+sf+"XB"+sf+"XX"+sf+"XY");
if(c==1) s+="Y";
else if(c==2) s+="B";
else s+="X";
ss=s.size();
}
}else if(s=="B"){
while(ss!=cc){
sf=s[ss-1];
int c = press(sf+"A"+sf+"XA"+sf+"XX"+sf+"XY");
if(c==1) s+="Y";
else if(c==2) s+="A";
else s+="X";
ss=s.size();
}
}else if(s=="X"){
while(ss!=cc){
sf=s[ss-1];
int c = press(sf+"B"+sf+"AB"+sf+"AA"+sf+"AY");
if(c==1) s+="Y";
else if(c==2) s+="B";
else s+="A";
ss=s.size();
}
}else if(s=="Y"){
while(ss!=cc){
sf=s[ss-1];
int c = press(sf+"B"+sf+"XB"+sf+"XX"+sf+"XA");
if(c==1) s+="A";
else if(c==2) s+="B";
else s+="X";
ss=s.size();
}
}
return s;
}
