EI

He knows about Cer​s​ei's plan that she wants to hurt him badly at the next opportunity and so does his father.

Well, the joke was, I discovered finally, that A sounds like ei in Yiddish.

Then, such an explosion and a sort of long drawn out ei-ei-ei-ei cry of horror from the Turks.

Lyra d soi, n d' eg, kai kithara leipetai, kai kata polin chrsima; kai au kat' agrous tois nomeusi syrinx an tis ei.