Honestly, I'm having a hard time trying to pronounce the letter S in Irish. I'm struggling at when I should pronounce it as an /s/ sound or an /sh/ sound. Because in the Irish word, "Tuircis" (Irish for Turkish), the S at the end is pronounced is Sh but in the word, "Téacs" (Irish for Text), S is pronounced as S. I don't see the rule since both those words end with an S. When to pronounce S as /s/ in Irish and when to pronounce it as /sh/?