#include <bits/stdc++.h>
#include "combo.h"
using namespace std;
string guess_sequence(int N){
int xx = press("X"); int aa = press("A"); int bb = press("B");
string solved_string = "";
if (xx==1) solved_string+="X";
else if (bb==1) solved_string+="B";
else if (aa==1) solved_string+="A";
else solved_string+="Y";
char valids[3];
int ct=0;
if (solved_string!="A"){ valids[ct] = 'A'; ct++;}
if (solved_string!="B"){ valids[ct] = 'B'; ct++;}
if (solved_string!="X"){ valids[ct] = 'X'; ct++;}
if (solved_string!="Y"){ valids[ct] = 'Y'; ct++;}
for (int i=1; i<N; i++){
string newnew = solved_string + valids[0] + valids[1] + solved_string + valids[0] + valids[2] + solved_string + valids[0] + valids[0] + solved_string + valids[1];
int p = press(newnew);
if (p==i+2) solved_string+=valids[0];
else if (p==i+1) solved_string+=valids[1];
else solved_string+=valids[2];
}
return solved_string;
}
