取り替えっこ

(1)change over, change around, as to a new order or sequence

(2)終わった新しい命令またはシーケンスに関する変化、まわりの変化、

(3)exchange or replace with another, usually of the same kind or category; "Could you convert my dollars into pounds?"; "He changed his name"; "convert centimeters into inches"; "convert holdings into shares"

(4)別のものと交換する、取り替える、通常同じ種類またはカテゴリーのものと

(1)