#include <combo.h>
#include <string>
#define t press
std::string guess_sequence(int N)
{
std::string r, p, o = "ABXY";
int i, j, c;
r = t("AB") ? t("A") ? "A" : "B" : t("X") ? "X" : "Y";
if (N == 1)return r;
for (i = 0; i < 4; i++)if (o[i] == r[0]){ o.erase(o.begin() + i); break; }
for (int i = 1; i < N - 1; i++)
{
p = r + o[0]; for (j = 0; j < 3;){ p += r + o[1] + o[j++]; }
c = t(p);
r += o[c == i ? 2 : c == i + 1 ? 0 : 1];
}
r += o[t(r + o[0] + r + o[1]) == N ? t(r + o[0]) == N ? 0 : 1 : 2];
return r;
}
