彼女、学生同士で情報交換をした

N5 彼女 kanojo she N5 学生 gakusei student N3 同士 doushi one another, companion, comrade N3 情報 jouhou information, data, intelligence N3 交換 koukan exchange, swap, replacement

N2 換 kan / ka.eru, -ka.eru, ka.waru interchange, period, change

N4 〜し shi Indicates multiple reasons or qualities, connects clauses or adjectives, means besides that, and also N5 〜を o Marks the direct object of an action, appears before the verb, shows what receives the action N5 〜で de Indicates where an action happens, means used, tool, cause, or material depending on context