#include "combo.h"
#include<bits/stdc++.h>
using namespace std;
std::string guess_sequence(int N) {
string s = "";
if (press(s + 'A') == 1) {
s += 'A';
} else if (press(s + 'B') == 1) {
s += 'B';
} else if (press(s + 'X') == 1) {
s += 'X';
} else {
s += 'Y';
}
for (int i = 1; i < N; i++) {
if (s[0] != 'A' and press(s + 'A') == i + 1) {
s += 'A';
} else if (s[0] != 'B' and press(s + 'B') == i + 1) {
s += 'B';
} else if (s[0] != 'X' and press(s + 'X') == i + 1) {
s += 'X';
} else {
s += 'Y';
}
}
cout << s << '\n';
return s;
}
