a | b | c = a+b+c-a&; B - A& C - A& B + A& B& C

the sum of books read by three people = 33+44+55-29-25-36+books read by all three people

= 42+books read by all three people

It is required that at least three people have read them, and at most 25

books that have not been borrowed = 1-42-