#include <bits/stdc++.h>
using namespace std;
using lint = long long;

bool check(int n) {
  for (int i = 0; i < 25; i++) {
    if ((n&(1<<i))==0 && (n&(1<<(i+1)))!=0 && (n&(1<<(i+2)))!=0) return true;
  }
  return false;
}

int main() {
  int n, k;
  cin >> n >> k;
  int cnt = 0;
  //cout << "start" << endl;
  for (int i = 0; ; i++) {
    cnt += check(i);
    if (cnt == k) {
      string s(n, 'A');
      for (int j = 0; j < min(n, 30); j++) {
        if (i&(1<<j)) s[j] = 'M';
      }
      reverse(s.begin(), s.end());
      cout << s << endl;
      return 0;
    }
  }
}