My Great-Uncle Alfred loves sequences and likes to test me with them whenever I visit.
The other day, with a flourish, "Voilà!", he presented me a piece of paper with the following sequence,
UI, AI, EEI, EUI, EEI, AEI, ?
"What comes next?" he asked.
"I'm not sure", I replied, "but I would guess it probably ends with the letter I".
"Wrong!", he exclaimed, with a cackle.
Can you tell what comes next in the sequence?