#include "combo.h"
#include <bits/stdc++.h>
using namespace std;
string guess_sequence(int N) {
//string a = "";
vector<char> b = {'A', 'B', 'X', 'Y'};
string s = "";
//for (int i = 0; i < 3; i++) {
string a = "";
a = b[0];
a += b[1];
//cout << a << "\n";
if (press(a) >= 1) {
a = b[0];
if (press(a) == 1) {
s += b[0];
b.erase(b.begin());
} else {
s += b[1];
b.erase(b.begin() + 1);
}
} else {
a = b[2];
if (press(a)) {
s += b[2];
b.erase(b.begin()+2);
} else {
s += b[3];
b.erase(b.begin()+3);
}
}
for (int i = 2; i < N; i++) {
string a;
a = s + b[0] + s + b[1] + b[0] + s + b[1] + b[1] + s + b[1] + b[2];
//cout << a << "\n";
int t = press(a);
if (t == (i)) {
s += b[0];
} else if (t == i+1) {
s += b[1];
} else {
s += b[2];
}
//cout <<t<<" " << s<< "\n";
}
if (N != 1) {
a = s + b[0] + s + b[1];
//cout << a << "\n";
if (press(a) == N) {
a = s+b[0];
if (press(a) == N) {
s += b[0];
//b.erase(b.begin());
} else {
s += b[1];
//b.erase(b.begin() + 1);
}
} else {
s += b[2];
}
}
return s;
}
