#include <bits/stdc++.h>
using namespace std;
#define int long long

int N,K;

signed main(){
  cin>>N>>K;
  int T = min(N,20ll);
  int cnt = 0;
  for(int i = 0; i < (1<<T); i++){
  	for(int j = 2; j < T; j++){
  		if((i & (1<<j)) && (i & (1<<(j-1))) && !(i & (1<<(j-2)))){
  			cnt++;
  			if(cnt == K){
  				string ans = "";
  				for(int k = N-1; k >= T; k--){
  					ans += "A";
  				}
  				for(int k = T-1; k >= 0; k--){
  					if(i & (1<<k)) ans += "M";
  					else ans += "A";
  				}
  				cout << ans << "\n";
  				return 0;
  			}
  			break;
  		}
  	}
  }
}