def extract_free_lines(input_file, output_file):
    free_lines = []

    with open(input_file, 'r', encoding='utf-8') as f_in:
        for line in f_in:
            # Remove trailing whitespace and newlines
            line = line.rstrip()
            # Check if line ends with "(free)"
            if line.endswith("(free)"):
                free_lines.append(line)

    with open(output_file, 'w', encoding='utf-8') as f_out:
        for line in free_lines:
            f_out.write(line + '\n')

# Replace these with your full paths
input_path = 'C:\\path\\to\\your\\input.txt'  # Windows example
output_path = 'C:\\path\\to\\your\\output.txt'

# For Linux/Mac, use format like:
# input_path = '/path/to/your/input.txt'
# output_path = '/path/to/your/output.txt'

# Run the function with full paths
extract_free_lines(input_path, output_path)