#include <bits/stdc++.h>
#include "combo.h"
using namespace std;
string guess_sequence(int n){
string p = "";
set <string> tr;
tr.insert("A");
tr.insert("B");
tr.insert("X");
tr.insert("Y");
int c = press("AB");
if(c==1){
c = press("A");
if(c==1)p+="A";
else p+="B";
}
else {
c = press("X");
if(c==1)p+="X";
else p+="Y";
}
tr.erase(p);
string b, x, y;
c = 0;
for(string h: tr){
if(c==0)b = h;
else if(c==1)x = h;
else y = h;
c++;
}
int count = 1;
for(int i=0; i<n-2; i++){
string t = p+b+p+x+y+p+x+x+p+x+b;
c = press(t);
if(c==count)p+=y;
else if(c==count+1)p+=b;
else p+=x;
count++;
}
string t = p+b;
c = press(t);
if(c==n)p+=b;
else{
c = press(p+x);
if(c==n)p+=x;
else p+=y;
}
return p;
}
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