二面隣接
https://gyazo.com/447cd5507b9360c8b970bc3c79b76fda https://gyazo.com/55d66134252de99beddd1005619576ab
https://gyazo.com/01e4cfc4a1a63d24ee49c68dac09bd40 https://gyazo.com/50fe1b3287a5d2c6b1b71bae8a12af94
https://gyazo.com/484fdbc68a5914555b392687bdb5ec18
https://gyazo.com/89f5169d3ab2e1d666e64f316aa13acb
https://gyazo.com/b8dbdae81e5409e99e9695f26f1a36ea https://gyazo.com/6a979a5ed8fddfc26b6af440081c89d4 https://gyazo.com/999f493b4ae06321d8dff39ee57434c1