#include<bits/stdc++.h>
using namespace std;
#define rep(i, n) for(int i = 0; i < (int)(n); i++)

int main(){
  int N, K, ans = 0, f;
  cin >> N >> K;
  while(K){
    ans++;
    f = 0;
    rep(i, min(N-2, 20)){
      if((ans>>i)%2 == 0 && (ans>>i+1)%2 && (ans>>i+2)%2)f = 1;
    }
    K -= f;
  }
  rep(i, N)cout << ((N-i-1 < 20 && (ans>>N-i-1)%2) ? 'M' : 'A');
  cout << endl;
}