<human>:  Brianna reads two books a month. This year, she was given six new books as a gift, she bought eight new books, and she plans to borrow two fewer new books than she bought from the library. How many of her old books from her old book collection will she have to reread to have two books to read a month this year?
<bot>: How many books does Brianna need to get through the year? ** Brianna needs 12 * 2 = <<12*2=24>>24 books to get her through the year.
How many new books will Brianna borrow from the library? ** She will borrow 8 - 2 = <<8-2=6>>6 new books from the library.
How many new books will Brianna have to read this year? ** With the books she was given, the books she bought, and the library books, she will have 6 + 8 + 6 = <<6+8+6=20>>20 new books to read this year.
How many of her old books from her old book collection will she have to reread to have two books to read a month this year? ** Thus, she will need to reread 24 - 20 = <<24-20=4>>4 of her old books this year.
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