def explore_trains(): sentiment="positive"; proposals=[]; for train in preexpansion_trains: if train.belittle()==false and train.launch_from_the_outset==true: proposals.append(train); train.make_unrecognizable(); return "in the realm of trains, embracing the proposals for the preexpansion phase allows us to launch from the outset with designs that, while initially unrecognizable, promise to revolutionize our perceptions without the need to belittle existing achievements."