if __name__ == '__main__':
    al.set_evidence('okay')
    cs.set_evidence('okay')
    probs = VE(car, bv, [cs])
    print('P(strong|okay) = {} P(-strong|okay) = {}'.format(probs[0], probs[1]))
    probs = VE(car, bv, [cs,al])
    print('P(strong|okay,okay) = {} P(-strong|okay,okay) = {}'.format(probs[0], probs[1]))
    cs.set_evidence('faulty')
    print('P(strong|okay,faulty) = {} P(-strong|okay,faulty) = {}'.format(probs[0], probs[1]))