Hownet is the same, but I know that the school Hownet is not open to individuals, and many treasures are fake! It doesn't matter if it doesn't include your senior's. I'm afraid that when you hand it over to the school to check the duplicate, your senior's is just included in HowNet. It's terrible. There are too many coincidences! Try using papertime. There are not only HowNet databases, but also online databases. If you have them on the paper net, you can check them. You should change them at once. Don't take chances! Papertime, I have a duplicate digital interchange code (four six three zero nine two for Arabic numerals)! I wish you a smooth graduation!