正規表現

正規表現チェッカー
https://weblabo.oscasierra.net/tools/regex/

正規表現サンプル
https://www.megasoft.co.jp/mifes/seiki/index_s2.html

文字列結合
https://qiita.com/tmak_tsukamoto/items/e8d11b1fd5a479f03501

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