Here’s a very difficult puzzle; it might take a day or more to solve it, I would think.

What is this?

A A A B A D A E A G A H A I A L A M A N A R A S A T A W A X A Y B A B E B I B O B Y D E D O E D E F E H E L E M E N E R E S E T E X F A F E G O H A H E H I H M H O I D I F I N I S I T J O K A K I L A L I L O M A M E M I M M M O M U M Y N A N E N O N U O D O E O F O H O I O M O N O P O R O S O W O X O Y P A P E P I Q I R E S H S I S O T A T I T O U H U M U N U P U S U T W E W O X I X U Y A Y E Y O Z A

Answer: next week.