번호	제목
3479	Equipment Box
3480	Secret Code
3481	The Proper Key
3482	Labyrinth
3483	Piggy-Bank
3484	Lifting the Stone
3485	Play on Words
3486	Adding Reversed Numbers
3487	Copying Books
3488	Substitution Cipher
3489	Commedia dell' arte
3490	Calculating Expressions on Turing Machine
3491	Skyscraper Floors
3492	Glass Beads
3493	Hares and Foxes
3494	Invitation Cards
3495	아스키 도형
3496	Binary Encoding
3497	Caption
3498	사전의 크기