#include "combo.h"
#include<bits/stdc++.h>
using namespace std;
string guess_sequence(int N) {
int x;
string s;
char c='C';
x = press("AB");
if(x>=1){
x = press("B");
if(x==1) c='B';
else c = 'A';
}
else {
x = press("X");
if(x==1) c='X';
else c = 'Y';
}
s+=c;
if(N==1)return s;
string s1, s2, s3, s4;
char c1, c2, c3, c4;
if(c=='A'){
s1 = "B"; s2 = "XX";s3 = "XY";s4 = "XB";
c1 ='Y';c2 = 'B';c3 = 'X';
}
if(c=='B'){
s1 = "A"; s2 = "XX";s3 = "XY";s4 = "XA";
c1 ='Y';c2 = 'A';c3 = 'X';
}
if(c=='X'){
s1 = "B"; s2 = "AA";s3 = "AY";s4 = "AB";
c1 ='Y';c2 = 'B';c3 = 'A';
}
if(c=='Y'){
s1 = "B"; s2 = "XX";s3 = "XA";s4 = "XB";
c1 ='A';c2 = 'B';c3 = 'X';
}
for(int i = 1; i < N-1; i++){
string st[4] = {s, s, s, s};
st[0]+=s1;
st[1]+=s2;
st[2]+=s3;
st[3]+=s4;
x = press(st[0]+st[1]+st[2]+st[3]);
if(x==i) s+=c1;
else if(x==i+1) s+=c2;
else if(x==i+2) s+=c3;
else s+='A';
}
if(c=='A'){
x = press(s+'B');
if(x==N) s+='B';
else {
x = press(s+'X');
if(x==N) s+='X';
else s+='Y';
}
}
if(c=='B'){
x = press(s+'A');
if(x==N) s+='A';
else {
x = press(s+'X');
if(x==N) s+='X';
else s+='Y';
}
}
if(c=='X'){
x = press(s+'B');
if(x==N) s+='B';
else {
x = press(s+'A');
if(x==N) s+='A';
else s+='Y';
}
}
if(c=='Y'){
x = press(s+'B');
if(x==N) s+='B';
else {
x = press(s+'X');
if(x==N) s+='X';
else s+='A';
}
}
return s;
}
