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yes; that is correct; right
um; errr; well
huh?
grrr; gah; must I?
good
ええ、そのとおりです。
Yes, that's right.
ええ、もちろん知っていますよ。
Yes, of course I know.
ええ、お気持ちはよく分かりますから安心して。
Yes, I understand your feelings well, so don't worry.