import argparse


def remove_domains(file_to_remove, file_to_remove_from, output_file):
    with open(file_to_remove, "r") as f_remove, open(
        file_to_remove_from, "r"
    ) as f_from:
        domains_to_remove = set(line.strip() for line in f_remove)
        all_domains = set(line.strip() for line in f_from)
    remaining_domains = all_domains - domains_to_remove
    with open(output_file, "w") as output:
        output.write("\n".join(remaining_domains))


if __name__ == "__main__":
    parser = argparse.ArgumentParser()
    parser.add_argument("-remove", required=True, dest="remove_path")
    parser.add_argument("-from", required=True, dest="from_path")
    parser.add_argument("-out", required=True, dest="out_path")
    args = parser.parse_args()
    remove_domains(args.remove_path, args.from_path, args.out_path)