How do you decode the note on the house in the pet shop in Club Penguin?

You look on press on the thing where is says code on the right. it says g has blank (this is the part where you have to answer). If you have any questions meet Candygirl767 and Ripcord27 at 5:30 - 8;30 at crunch if it is full go on vanilla. On Friday Saturday and Sunday.