匚: 匚 匸 郾 匣 叵 匠 匾 匯
匡 匪 匹 匝 匱 匭

匿: 匿 慝

医: 医 翳 醫

區: 區 毆 歐 鷗 甌

Above characters begin with the 匚 shape.

Large groups of characters are subsorted first via second element using:
囗⺆凵𠄌
乛厂丿丶
八一丨十
Then via trailing element using:
口山乚
⺆𠃌亅
丿丶㇏乂八小
丨一土十