def remove_duplicates(input_list):
    # Initialize an empty list to store the result
    result = []
    # Initialize an empty set to track seen elements
    seen = set()
 
    # Iterate over each element in the input list
    for item in input_list:
        # If the item is not in the seen set, it's not a duplicate
        if item not in seen:
            # Add the item to the result list
            result.append(item)
            # Mark the item as seen by adding it to the set
            seen.add(item)
 
    # Return the result list with duplicates removed
    return result
 
# Example usage
print(remove_duplicates([1, 2, 2, 3, 4, 4, 5]))  # Output: [1, 2, 3, 4, 5]

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