I entered the code 4318 to get into the headmaster’s office. For some reason, absolutely nothing is happening. I don’t know where I’ve gone wrong. I have removed all 399 tiles, but I can’t finish off the quest if I can’t enter this code and get into the headmaster’s office (At least, I’m guessing that’s what it wants me to do being as that is what the clues tell me is so). What shall I do? Any help wouldn’t be greatly appreciated. Thanks.