#include <iostream>
#include <cmath>

using namespace std;

int n;
void rezolva() {
    int log;
    log = log2(n * 1.0);
    if ((1 << log) == n) {
        log = (1 << (log - 1)) + 1;
        for (int i = 1; i <= log; i++) cout << 'A';
        cout << '\n';
        for (int i = 1; i <= n; i++) cout << 2;
        cout << '\n';
        return;
    }
    if ((1 << log) + 1 == n) {
        log = (1 << (log - 1)) + 1;
        for (int i = 1; i <= log; i++) cout << 'A';
        cout << "BB";
        cout << '\n';
        for (int i = 1; i < n; i++) cout << 2;
        cout << 1;
        cout << '\n';
        return;
    }
    int a = n / 2, b;
    for (int i = 1; i <= a; i++) cout << 'A';
    log = (1 << log);
    b = n - log - 1;
    for (int i = 1; i <= b; i++) cout << 'B';
    cout << "\n121";
    b++;
    if (n % 2 == 0)
        for (int i = 4; i <= n; i++) cout << 2;
    else {
        for (int i = 4; i < n; i++) cout << 2;
        cout << 1;
    }
    cout << '\n';

}

int main() {
    cin >> n;
    rezolva();
    return 0;
}
