def remove_comments(input_file, output_file):
    with open(input_file, 'r') as infile, open(output_file, 'w') as outfile:
        for line in infile:
            cleaned_line = line.split('--')[0].rstrip()  # Remove comment and trailing whitespace
            if cleaned_line:  # Check if the line is not empty
                outfile.write(cleaned_line + '\n')

if __name__ == "__main__":
    import sys
    if len(sys.argv) != 3:
        print("Usage: python remove_comments.py <input_file> <output_file>")
        sys.exit(1)

    input_file = sys.argv[1]
    output_file = sys.argv[2]
    remove_comments(input_file, output_file)