The kata description states that "The last session in the array cannot end after the cinema closes". The session starting at 2:30 would end after the cinema closes at 3:00, which is why it isn't in the list. Hope this helps!

The output should be a ciphered string.

Hi and welcome to Codewars - as this is your first ever solved kata, please note: you aren't supposed to post your solutions on Discourse page.

You can discuss it in the Solutions page instead, which you can access in the tab under the kata title at the top of the menu.