#include <bits/stdc++.h>
using namespace std;
using ll = long long;
constexpr int INF = 1 << 29;

int main() {
    ios::sync_with_stdio(false);
    cin.tie(0);
    int n, k;
    cin >> n >> k;
    array<array<int,4>,2> id;
    for(int i = 0; i < 2; i++) id[i].fill(-1);
    vector<array<array<int,4>,2>> dp(n, id);
    string ans(n, 'A');
    auto rec = [&](auto rec, int p, int s, int S) -> int {
        if(p == n) return s;
        if(dp[p][s][S] != -1) return dp[p][s][S];
        int ans = 0;
        for(int i = 0; i < 2; i++){
            int NS = i * 4 + S;
            ans += rec(rec, p + 1, (NS == 0b011) | s, NS / 2);
        }
        return dp[p][s][S] = min(ans, INF);
    };
    int S = 0, st = 0;
    for(int i = 0; i < n; i++){
        int v = rec(rec, i + 1, st | (S == 0b011), S / 2);
        if(k <= v){
            ans[i] = 'A';
        }else{
            S += 4;
            k -= v;
            ans[i] = 'M';   
        }
        st |= (S == 0b011);
        S /= 2;
    }
    cout << ans << '\n';
}