<img width="732" alt="image" src="https://user-images.githubusercontent.com/1742307/214194106-ce4f73eb-3670-44da-87c5-20e28ae724d6.png"> 2x2타일을 채우는건 3가지 경우가 맞는거 같아요 (1x2, 1x2) (2x1, 2x1) (2x2)