#include "combo.h"
#include <bits/stdc++.h>
#define fi first
#define se second
#define pb push_back
#define ll long long
using namespace std;
typedef pair<int,int> pii;
typedef pair<pii, int> ipii;
const int MAXN = 1e3+100;
string ans, p;
int coin;
char sta;
char ch[4];
string guess_sequence(int N) {
coin = press("AB");
if(coin >= 1){
coin = press("A");
if(coin==1) sta = 'A';
else sta = 'B';
} else {
coin = press("X");
if(coin==1) sta = 'X';
else sta = 'Y';
}
char nx = (sta=='A' ? 'B' : 'A');
for(int i=0; i<=2; i++){
ch[i] = nx;
if(nx == 'A') nx = (sta=='B' ? 'X' : 'B');
else if(nx == 'B') nx = (sta=='X' ? 'Y' : 'X');
else if(nx == 'X') nx = 'Y';
}
ans = sta;
if(N==1) return ans;
for(int i = 2; i<=N-1; ++i) {
p.clear();
p = (ans+ch[0] + ch[0]); p += (ans+ch[0] + ch[1]); p += (ans+ch[0] + ch[2]);
p += (ans + ch[1]);
//cout << i << ' ' << p << " p\n";
coin = press(p);
char add;
if(coin == i+1){ // a ato b
add = ch[0];
} else if(coin==i){
add = ch[1];
} else add = ch[2];
ans += add;
}
coin = press(ans+ch[0]+ans+ch[1]);
//cout << N << ' ' << ans+ch[0]+ans+ch[1] << " p\n";
if(coin == N){
coin = press(ans+ch[0]);
if(coin==N) ans += ch[0];
else ans += ch[1];
} else {
ans += ch[2];
}
return ans;
}
