#pragma GCC optimize "O3,omit-frame-pointer,inline"
#pragma GCC push_options
#pragma GCC optimize ("unroll-loops")
#define _USE_MATH_DEFINES
#include <bits/stdc++.h>
using namespace std;

signed main () {
  std::ios::sync_with_stdio(false); std::cin.tie(0);
  long long n;
  cin >> n;
  string ans;

  function<bool(long long)> dfs = [&](long long x) {
    if (x == 1) return true;
    cerr << "x = " << x << endl;
    x--;
    cerr << "x after decrement = " << x << endl;
    if (x % 2 == 0) {
      if (dfs(x / 2)) {
        ans += 'A';
        return true;
      }
    }
    if (x % 3 == 0) {
      if (dfs(x / 3)) {
        ans += 'B';
        return true;
      }
    }
    if ((x % 2 != 0) && (x % 3 != 0)) {
      return false;
    }
    return false;
  };

  dfs(n);

  cout << ans << endl;
  return 0;  
}