Which script should be assigned so that the bot counts certain posts given to the creators in certain groups of a certain page?

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For example:
A certain page "Vlad Kolesnikov" copies my text "hello ...." and pastes it in the groups that they wrote to him.
The task of the bot is to count how many posts this page has made and throw into the conversation "for example" "32 posts were made by Vlad Kolesnikov", provided that the bot should not take into account the posts that the page made in the same group more than 2 times