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

int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
 
    int N,K; cin >> N >> K;
    int inf = 1001001;
    vector<vector<int>> dp0(N+1,vector<int>(8)),dp1 = dp0;
    dp0.at(N).at(7) = 1;
    for(int i=N-1; i>=0; i--){
        for(int k=0; k<8; k++){
            int to = k/2,to2 = k/2+4;
            dp0.at(i).at(to) += dp0.at(i+1).at(k);
            dp1.at(i).at(to) += dp1.at(i+1).at(k);
            if(to2 == 6) dp1.at(i).at(to2) += dp0.at(i+1).at(k);
            else dp0.at(i).at(to2) += dp0.at(i+1).at(k);
            dp1.at(i).at(to2) += dp1.at(i+1).at(k);
            dp0.at(i).at(to) = min(inf,dp0.at(i).at(to));
            dp0.at(i).at(to2) = min(inf,dp0.at(i).at(to2));
            dp1.at(i).at(to) = min(inf,dp1.at(i).at(to));
            dp1.at(i).at(to2) = min(inf,dp1.at(i).at(to2));
        }
    }

    string answer = "";
    bool ok = false;
    for(int i=0; i<N; i++){
        if(!ok){
            int sum = 0;
            for(int k=0; k<4; k++) sum += dp1.at(i).at(k);
            int sum2 = sum+dp1.at(i).at(4)+dp1.at(i).at(5),sum3 = sum2+dp1.at(i).at(6);
            if(K > sum){
                answer += 'M';
                if(K > sum2 && K <= sum3) answer += "MA",i += 2,ok = true,K -= sum2;
                else K -= sum;
                
            }    
            else answer += 'A';
        }
        else{
            int sum = 0;
            for(int k=0; k<4; k++) sum += dp1.at(i).at(k)+dp0.at(i).at(k);
            if(K > sum) K -= sum,answer += 'M';
            else answer += 'A';
        }
    }
    cout << answer << endl;

}