#include <iostream>


using namespace std;

void tower(int n, char src, char dest, char temp) {
    if (n == 0) {
        return;
    }
    tower(n - 1, src, temp, dest);
    cout << n << " " << src << " -> " << dest << endl;
    tower(n - 1, temp, dest, src);
}




int main() {
    setlocale(LC_ALL, "ru");

    tower(5, 'A', 'C', 'B');

}