#include "combo.h"
#include <iostream>
using namespace std;
std::string guess_sequence(int N) {
string p, s = "";
if (press("A") == 1) s += "A";
if (press("B") == 1) s += "B";
if (press("X") == 1) s += "X";
if (press("Y") == 1) s += "Y";
if (press(s + "A") == 2) s += "A";
if (press(s + "B") == 2) s += "B";
if (press(s + "X") == 2) s += "X";
if (press(s + "Y") == 2) s += "Y";
if (press(s + "A") == 3) s += "A";
if (press(s + "B") == 3) s += "B";
if (press(s + "X") == 3) s += "X";
if (press(s + "Y") == 3) s += "Y";
return s;
}