function hanoi(n, source, target, spare) {
  if (n === 0) {
    return;
  }
  hanoi(n - 1, source, spare, target);
  console.log(`Move disk ${n} from ${source} to ${target}`);
  hanoi(n - 1, spare, target, source);
}

hanoi(3, "A", "C", "B");