#include <bits/stdc++.h>
#include "combo.h"
#define x first
#define y second
#define all(v) v.begin(), v.end()
#define chkmin(a, b) a = min(a, b)
#define chkmax(a, b) a = max(a, b)
using namespace std;
typedef long long ll;
typedef vector<int> vi;
typedef vector<vi> vvi;
typedef pair<int, int> pii;
typedef vector<pii> vii;
mt19937 rng(time(0));
char letters[] = {'A', 'B', 'X', 'Y'};
string guess_sequence(int n) {
string p = "";
for (int i = 0; i < n; i++) {
shuffle(letters, letters + 4, rng);
string curr = p + "A" + p + "B";
if (press(curr) >= i + 1) {
curr = p + "A";
if (press(curr) >= i + 1) p.push_back('A');
else p.push_back('B');
} else {
curr = p + "X";
if (press(curr) >= i + 1) p.push_back('X');
else p.push_back('Y');
}
// for (char c : letters) {
// if (i && c == p[0]) continue;
// p.push_back(c);
// if (press(p) == p.size()) break;
// p.pop_back();
// }
}
return p;
}
