The title should be "Grösste Städte in der Schweiz ∙ A-Z".
"Grösste", because "ß" does not exist in Swiss German and most quiz takers are bound to be Swiss and "der" because Switzerland is feminin in German and needs the article.
Super Quiz! Fribourg und Neuchatel sollen gültig sein. Sogar in der Deutschschweiz sagen fast niemand Freiburg und Neuenburg. Ebenfalls für Yverdon, Illnau oder Rapperswil, niemand sagt die komplette Name
"Grösste", because "ß" does not exist in Swiss German and most quiz takers are bound to be Swiss and "der" because Switzerland is feminin in German and needs the article.