Hexagonal

https://fitpet.medium.com/%ED%94%8C%EB%A0%88%EC%9D%B4-%EC%8A%A4%EC%BF%BC%EB%93%9C-%ED%97%A5%EC%82%AC%EA%B3%A0%EB%82%A0-%EC%95%84%ED%82%A4%ED%85%8D%EC%B2%98-%EC%A0%81%EC%9A%A9%EA%B8%B0-6e9e79f740e7