Spivak A.V.

An alien from the star Tau Ceti, upon arriving on Earth on Monday, exclaimed: "A!". On Tuesday, he exclaimed: "AU!", on Wednesday — "AUUA!", on Thursday — "AUUAUAAU!". What will he exclaim on Saturday?
Divide the "following" statement in half and compare it with the "previous".

## Solution

By dividing the "following" statement into two equal parts, we see that the first half matches the "previous", while the second half is a "mirror reflection" of the previous, meaning the letters A and U are swapped.

## Answer

" AUUAAUAAUUAUAAUUAUAAUUAUAAUUAU!"