Greetings from the Club of Programmers

With over 2.6 billion active Android users in the multiverse, the mobile industry grows exponentially. The Multiverse of Languages needs programmers who can meet this demand.

So we are arriving now on Earth-616 to meet one of the most famous languages in this multiverse - Kotlin.

Kotlin is the successor to Java, with more robust/cool features and safety. It can not only be used for android but server-side programming as well. All the legacy Java Code is being changed over to Kotlin. Can you help them out?

Come on, traveller, it's time to go home…