#include <bits/stdc++.h>
#define ll long long
#define ld long double
#define rep(i, r) for(int i = 0; i < (int)(r); i++)
#define reap(i, k, r) for(ll i = (ll)(k); i < (ll)(r); i++)
#define ALL(x) std::begin(x), std::end(x)
#define rALL(x) std::rbegin(x), std::rend(x)
#define MOD 998244353
using namespace std;
int main(){
    ll N, K; cin >> N >> K;
    ll ma = min(N, (ll)17);
    set<string> st;
    for(ll i = 0; i < (1 << ma); i++){
        string s = "";
        ll is = 0;
        rep(j, ma){
            if(i & (1 << j)){
                s += 'M';
            }
            else{
                s += 'A';
            }
            if(j >= 2){
                if(s[j - 2] == 'M' && s[j - 1] == 'M' && s[j] == 'A'){
                    is = 1;
                }
            }
        }
        if(is)st.emplace(s);
    }
    ll cnt = 0;
    for(auto x : st){
        cnt++;
        if(cnt == K){
            rep(i, (N - ma))cout << "A";
            cout << x << endl;
            break;
        }
    }
}