def remove_duplicates(input_file, output_file):
    with open(input_file, 'r') as file:
        lines = file.readlines()

    unique_lines = set()
    with open(output_file, 'w') as file:
        for line in lines:
            if line not in unique_lines:
                file.write(line)
                unique_lines.add(line)

if __name__ == "__main__":
    import sys
    if len(sys.argv) != 2:
        print("Usage: python remove_duplicates.py <input_file>")
        sys.exit(1)

    input_file = sys.argv[1]
    output_file = 'output_no_duplicates.txt'
    remove_duplicates(input_file, output_file)