Reversed alphabet

Ai: say all of the alphabet. You: A B C D E F G H I J K L M N O P Q R S T U V W X Y Z Ai: And now say it backwards. You: I don't know. Ai: How would you don't know? You: Because I'm not smart enough. Ai: It's so easy! Let me try to say it. Z... Okay I actually don't know. That's the end!