#include <bits/stdc++.h>

#define rep(i, a, b) for(int i = (a); i <= (b); i ++)
using std::cin, std::cout, std::cerr;
using ll = long long;

int main() {
    std::ios::sync_with_stdio(false);
    int n, k; cin >> n >> k;

    auto check = [](int x) {
        while(x > 0) {
            if(x % 8 == 0b110)
                return true;
            x /= 2;
        }
        return false;
    };

    int x = 0;
    while(k > 0) {
        x ++;
        if(check(x)) k --;
    }

    std::string ans = "";
    while(x > 0) {
        ans = std::string() + ((x & 1) ? "M" : "A") + ans;
        x /= 2;
    }
    ans = std::string(n - ans.size(), 'A') + ans;
    cout << ans << '\n';
}