Позвонишь, созвонимся, звонят, позвонит, позвонил. Позвони́шь, созвони́мся, etc. is used by A, B; позво́нишь, созво́нимся, etc. is used by C, D, F. A uses also на созво́не, which is a different story.

Квартал et al. Кварта́л is used by A; ква́ртал is used by C, D and, puzzlingly, by E.

Тортом et al. Торто́м was said by F, who was corrected by B: то́ртом. A year later, was said again by F, who was now corrected by A.

Овцы. G said о́вцы, but quickly changed their mind and said овцы́.

I thought there was something odd going on, but there wasn’t:

Зерка́л. J said. It is correct.

2019-04-08