Board Thread:Linguistics/@comment-29990748-20190115064431

So I’m starting on a language for my conworld. It is spoken by the trolls, who don’t have lips. Now I know this means they will not be able to use bilabial, labiodental or Linguolabial sounds. But I don’t know which vowels they would be able to produce, if anyone knows please just comment a list of vowels they can. Thank you 