#include "combo.h"
#include <bits/stdc++.h>
using namespace std;
#define rep(i,a,b) for (int i = (a); i <= (b); i++)
#define debug(a) cout << #a << " = " << a << endl
string st,prueba;
char a,b,c;
int p,n;
string guess_sequence(int N) {
n = N;
prueba = "AB";
p = press(prueba);
if (p == 1 || p == 2) {
p = press("A");
if(p == 1) st = "A";
else st = "B";
}
else {
p = press("X");
if(p == 1) st = "X";
else st = "Y";
}
a = 'A';
b = 'B';
c = 'X';
if (st[0] == 'A') a = 'Y';
else if (st[0] == 'B') b = 'Y';
else if (st[0] == 'X') c = 'Y';
if (n > 1) {
rep(i,2,n-1) {
prueba = st + b + st + c + a + st + c + b + st + c + c ;
p = press(prueba);
if (p == i-1) st += a;
else if (p == i) st += b;
else st += c;
}
prueba = st+a;
p = press(prueba);
if (p == n) st += a;
else {
prueba = st+b;
p = press(prueba);
if (p == n) st += b;
else st += c;
}
}
return st;
}
