# Learn Recursion by Solving the Tower of Hanoi Puzzle - Step 31

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# Step 31

It’s time to move some code from the `move()` function to the `make_allowed_move()` function. Move the code nested inside the first `if` statement (except the first `print()` call) to your new function. Pay close attention to the indentation. Don’t forget to remove the `pass` keyword.

``````NUMBER_OF_DISKS = 3
number_of_moves = 2**NUMBER_OF_DISKS - 1
rods = {
'A': list(range(NUMBER_OF_DISKS, 0, -1)),
'B': [],
'C': []
}

# User Editable Region

def make_allowed_move(source, target):
forward = False
if not rods[target]:
forward = True
elif rods[source] and rods[source][-1] < rods[target][-1]:
forward = True
if forward:
print(f'Moving disk {rods[source][-1]} from {source} to {target}')
rods[target].append(rods[source].pop())
else:
print(f'Moving disk {rods[target][-1]} from {target} to {source}')
rods[source].append(rods[target].pop())

def move(n, source, auxiliary, target):
# display starting configuration
print(rods)
for i in range(n):
remainder = (i + 1) % 3
if remainder == 1:
print(f'Move {i + 1} allowed between {source} and {target}')
# display our progress
print(rods)

# User Editable Region

elif remainder == 2:
print(f'Move {i + 1} allowed between {source} and {auxiliary}')
elif remainder == 0:
print(f'Move {i + 1} allowed between {auxiliary} and {target}')

# initiate call from source A to target C with auxiliary B
move(NUMBER_OF_DISKS, 'A', 'B', 'C')
``````

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### Challenge Information:

Learn Recursion by Solving the Tower of Hanoi Puzzle - Step 31

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