Passage: A manga version of Legend of the Golden Witch drawn by Kei Natsumi began serialization in the January 2008 issue of Square Enix's Gangan Powered, which was later transferred to the debut May 2009 issue of Gangan Joker after Gangan Powered was discontinued, and continued until the September 2009 issue. An adaptation of Turn of the Golden Witch drawn by Jirō Suzuki began serialization in the August 2008 issue of Square Enix's GFantasy. The manga adaptation of Banquet of the Golden Witch began serialization in the October 2009 issue of Gangan Joker and is illustrated by Kei Natsumi. Sōichirō draws the adaptation of Alliance of the Golden Witch, which began serialization in Square Enix's Internet-based magazine Gangan Online on October 1, 2009. The first bound volume for Legend of the Golden Witch was released in Japan on June 21, 2008 under Square Enix's Gangan Comics imprint. Yen Press licensed the various Umineko manga published by Square Enix for release in North America. A four-panel comic strip entitled Umineko Biyori: Rokkenjima e Yōkoso!! (うみねこびより。～六軒島へようこそ!!～) and illustrated by Makoto Fugetsu was serialized in Ichijinsha's Manga Palette Lite magazine between March 1, 2008 and March 2, 2009. A single bound volume for Umineko Biyori was released on June 22, 2009.

Question: What is the structure of the Umineko Biyori: Rokkenjima e Yōkoso!! comic strip?
four-panel