#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";
}
string valids[3];
if (solved_string=="A"){ valids[0] = "Y"; valids[1] = "B"; valids[2] = "X";}
if (solved_string=="B"){ valids[0] = "A"; valids[1] = "X"; valids[2] = "Y";}
if (solved_string!="X"){ valids[0] = "A"; valids[1] = "B"; valids[2] = "Y";}
if (solved_string!="Y"){ valids[0] = "A"; valids[1] = "B"; valids[2] = "X";}
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];
}
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;
}
