哎唷

āiyō
  1. interjection of pain or surprise
  2. also written 哎哟

CEDICT

Entry Composition

1 哎 āi
  1. hey!
  2. (interjection used to attract attention or to express surprise or disapprobation)
=2 唷 yō
  1. (interjection expressing surprise) Oh!
  2. My!
=2 唷 yo final particle expressing exhortation, admiration etc

Related entries

哎哟 āiyō
  1. hey
  2. ow
  3. ouch
  4. interjection of pain or surprise
哎哟，撞到你了，对不起！

Ah, I hit you, sorry!

Source: Tatoeba