#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";}
else if (press("B")==1) {ans="B";letters[0]="A";letters[1]="X";letters[2]="Y";}
else if (press("X")==1) {ans="X";letters[0]="B";letters[1]="A";letters[2]="Y";}
else {ans="Y";letters[0]="B";letters[1]="X";letters[2]="A";}
int n=1;
if (N==1){
return ans;
} else if (N==2){
if(press(ans+letters[0])==2) ans+=letters[0];
else if(press(ans+letters[1])==2) ans+=letters[1];
else ans+=letters[2];
return ans;
} else{
while(n<=N-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];
// if(press(ans+letters[0])==n+1) ans+=letters[0];
// else if(press(ans+letters[1])==n+1) ans+=letters[1];
// else ans+=letters[2];
n++;
}
if(press(ans+letters[0])==n+1) ans+=letters[0];
else if(press(ans+letters[1])==n+1) ans+=letters[1];
else ans+=letters[2];
return ans;
}
}
