#include "combo.h"
#include <bits/stdc++.h>
using namespace std;
// int press(string q){return 1;}
string guess_sequence(int N){
string ans;
string letters[3];
if (press("A")==1) {ans="A";letters[0]="B";letters[1]="X";letters[2]="Y";}
if (press("B")==1) {ans="B";letters[0]="A";letters[1]="X";letters[2]="Y";}
if (press("X")==1) {ans="X";letters[0]="B";letters[1]="A";letters[2]="Y";}
if (press("Y")==1) {ans="Y";letters[0]="B";letters[1]="X";letters[2]="A";}
int n=1;
while(ans.length()<=3-2){
int query = press(ans+letters[0]+ans+letters[1]+letters[0]+ans+letters[1]+letters[1]+ans+letters[1]+letters[2]);
if (query==n+1) ans+=letters[0];
else if (query==n+2) ans+=letters[1];
else ans+=letters[2];
n++;
}
if (press(ans+letters[0])==N) ans+=letters[0];
else if (press(ans+letters[1])==N) ans+=letters[1];
else ans+=letters[2];
return ans;
}
