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

#define rep(i, a, b) for (int i = a; i < b; i++)
using ll = long long;
  
int main() {
	int n, k;
	cin >> n >> k;
	int mask = 7, ptn = 6, i = 6, ma = 1e5;
	vector<int> v;
	while(int(v.size()) < ma) {
		int j = i;
		while(j) {
			int p = j & mask;
			if(p == ptn) {
				v.push_back(i);
				break;
			}
			j /= 2;
		}
		i++;
	}
	int e = v[k - 1];
	string s;
	while(e) {
		if(e % 2) s += 'M';
		else s += 'A';
		e /= 2;
	}
	reverse(s.begin(), s.end());
	int sz = s.size();
	sz = n - sz;
	cout << string(sz, 'A') << s << endl;
}