What does おゆ mean after れい

Question

In the game Overwatch, you can get your character to say some set phrases (hello, thanks, etc).

When changing the game language to Japanese, one of the characters, "Reaper" has 2 different ways of saying "thank you":

1. ありがとう
2. What sounds to me like れいおゆ

I found 礼 on Jisho, which has a れい reading, but what does おゆ mean here? Or am I hearing it wrong?

The character saying it is pretty evil if that gives any context.

I uploaded a clip of the audio to soundcloud

Answer 1

He says:

「礼{れい}を言{ゆ}う。ありがとう。」

Note that 「言う」 can be pronounced both 「いう」 and 「ゆう」.