Explanation
Either A or B; Regardless of whether it's A or B.
Formation
Noun + にせよ + Noun + にせよ (also works with verbs in dictionary form + にせよ)
Detailed explanation
The 〜にせよ 〜にせよ grammar point is used to express two possibilities A and B, indicating that regardless of whether it is A or B, the statement remains valid. It can be translated as 'whether it's A or B.'
Examples
Ame ni seyo yuki ni seyo, shiai wa chuushi shinai.
Whether it's rain or snow, the match won't be cancelled.
Kare ni seyo kanojo ni seyo, dareka hitori ga iku beki da.
Whether it's him or her, someone should go.
Seika ni seyo doryoku ni seyo, dochira mo juuyou da.
Whether it's results or effort, both are important.
Haru ni seyo aki ni seyo, watashi wa hana ga suki da.
Whether it's spring or fall, I like flowers.
Practice
Grammar content sourced from hanabira.org.