4in4x4C
https://scrapbox.io/files/61f5564a0f3089001d8e11e0.png
https://scrapbox.io/files/61f5564d7a091b001d257afd.png
構成
2in2x2
x2
2in3x3
x2
2in4x2
x2
問題
25x25
(
2022-01-16
) author: 薄廻