How to import contacts from csv file to the bat?

Question

csv

I create a csv file, enter data for the address book as in the screenshot, import data from this file into the bat address book, but a window pops up that no contacts have been imported. What's wrong? How else can you import? Is it possible through a text document, but with an indication of both the name and patronymic (just an address without a name will not work). I'm not friendly with other file formats. If these don't work, how can you create and import other file formats? I don't understand well, step by step if possible.