input: def solveTowerOfHanoi(num_disks, start_rod = 'A', end_rod = 'C', aux_rod = 'B'): 
      if num_disks == 1: 
          print("Move disk 1 from rod", start_rod, "to rod", end_rod) 
          return
      solveTowerOfHanoi(num_disks - 1, start_rod, aux_rod, end_rod) 
      print("Move disk", num_disks, "from rod", start_rod, "to rod", end_rod) 
      solveTowerOfHanoi(num_disks - 1, aux_rod, end_rod, start_rod)
  
  # Example:
  # for solveTowerOfHanoi(4)
  # Output should show the steps to move 4 disks from rod A to rod C using rod B as auxiliary.
output:     if num_disks == 1: 
          print("Move disk 1 from rod", start_rod, "to rod", end_rod) 
          return
      solveTowerOfHanoi(num_disks - 1, start_rod, aux_rod, end_rod) 
      print("Move disk", num_disks, "from rod", start_rod, "to rod", end_rod) 
      solveTowerOfHanoi(num_disks - 1, aux_rod, end_rod, start_rod)