from bok import Bok

def hovedprogram():

    b1 = Bok("Shogun", "James Clavell", 1975)
    b2 = Bok("Sapiens", "Noah Harari", 2010)
    b3 = Bok("Norwegian Wood", "Haruki Murakami", 1987)
    b4 = Bok("Bienes historie", "Maja Lunde", 2015)
    b5 = Bok("The Hobbit", "J.R.R Tolkien", 1937)

    b?ker = [b1,b2,b3,b4,b5]

    for bok in b?ker:
        if bok.hent_?r() < 2000:
            print(bok.hent_tittel())

hovedprogram()