#include <bits/stdc++.h>
#include "combo.h"
using namespace std;
string guess_sequence(int N){
if (N!=3) return "";
string solved_string;
/*int xy = press("XY");
if (xy==1){
if (press("X") == 1){
solved_string = "X";
}
else solved_string = "Y";
}
else{
if (press("A") == 1){
solved_string = "A";
}
else solved_string = "B";
}*/
if (press("A")==1) solved_string = "A";
if (press("B")==1) solved_string = "B";
if (press("X")==1) solved_string = "X";
if (press("Y")==1) 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-1; 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];
}*/
if (N==3){
if (press(solved_string+"A")==2) solved_string +='A';
if (press(solved_string+"B")==2) solved_string+='B';
if (press(solved_string+"X")==2) solved_string+='X';
if (press(solved_string+"Y")==2) solved_string+='Y';
}
string hi = solved_string+valids[0]; string ih = solved_string+valids[1];
string ihhi = solved_string+valids[2];
if (press(hi) == N) return hi;
if (press(ih) == N) return ih;
else return ihhi;
}
