#!/usr/bin/env python
# encoding: utf-8


def main():
    import sys
    if len(sys.argv) != 2:
        print("Usage: python3 copyleft.py <file>")
        return

    file_path = sys.argv[1]
    with open(file_path, 'r', encoding='utf-8') as file:
        lines = file.readlines()

    output = []
    for line in lines:
        stripped_line = line.strip()
        if stripped_line:
            output.append(stripped_line)

    with open(f"{file_path}.clean", "w", encoding='utf-8') as cleaned_file:
        cleaned_file.write("\n".join(output))


if __name__ == "__main__":
    main()