function hanoi (n,towerA,towerB,towerC) {
    index++;
    if (n == 1) {
        console.log(towerA + "->" + towerC);
    } else {
        hanoi(n - 1,towerA,towerC,towerB);
        console.log(towerA + "->" + towerC);
        hanoi(n - 1,towerB,towerA,towerC);
    }
}
var towerA = "a";
var towerB = "b";
var towerC = "c";
var index = 0;
var num = parseInt(readline());
hanoi(num,towerA,towerB,towerC);