Can you please recommend the best option for train tickets? We are traveling from Zurich to Andermatt (1), Andermatt to Zermatt (2), visit the Matterhorn (a separate train ticket?), Zermatt to Interlocken (3), Travel via train when in Interlocken (4-5), Interlocken to Lucerne (6), Lucerne to Zurich (7). I’m not sure why we would get half price tickets if we need to pay the full price? Thank you!