片かたっ端ぱしから

adverb

one after another; systematically; thoroughly

Used when dealing with every single item or person in a group, one by one, without skipping any. Often implies a thorough, exhaustive approach.

• 彼かれは片かたっ端ぱしから問もん題だいを解といていった。

  He solved the problems one after another.

• 図と書しょ館かんの本ほんを片かたっ端ぱしから読よんだ。

  I read every single book in the library, one after another.