def remove_duplicates(input_list):
  """
  Removes duplicate elements from a list while preserving the original order.
 
  Args:
    input_list: The list to remove duplicates from.
 
  Returns:
    A new list with duplicates removed.
  """
  new_list = []  # Create an empty list to store unique elements
  seen = set()   # Create an empty set to keep track of elements we've seen
 
  for element in input_list:
    if element not in seen:  # If we haven't seen this element before
      new_list.append(element)  # Add it to the new list
      seen.add(element)       # And mark it as seen
 
  return new_list
 
# Example usage:
my_list = [1, 2, 2, 3, 4, 4, 5]
result = remove_duplicates(my_list)
print(result)  # Output: [1, 2, 3, 4, 5] 

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