#include "combo.h"
#include<bits/stdc++.h>
#define all(x) x.begin(), x.end()
#define pq priority_queue
#define lb lower_bound
#define ub upper_bound
#define pb push_back
#define eb emplace_back
#define F first
#define S second
using namespace std;
string guess_sequence(int N) {
string S;
string opt;
if (press("AB")) {
if (press("A")) {S = "A"; opt = "BXY";}
else {S = "B"; opt = "AXY";}
} else {
if (press("X")) {S = "X"; opt = "ABY";}
else {S = "Y"; opt = "ABX";}
}
if (N == 1) return S;
for(int i=1;i<N-1;i++) {
string tmp = S+opt[0]+opt[0] + S+opt[0]+opt[1] + S+opt[0]+opt[2] + S+opt[1];
int ct = press(tmp);
if(ct==i+2) S += opt[0];
else if(ct==i+1) S += opt[1];
else S += opt[2];
}
if (press(S + opt[0]) == N) S += opt[0];
else if (press(S + opt[1]) == N) S += opt[1];
else S += opt[2];
return S;
}
