You could use:
-Alright
-Sure
-Yes
-Fine
And if you don't wanna do it, but you'll do it anyways, you could say WHATEVER!
Fantastic, Perfect, phenomenal, terrific, all right, okay, awesome, etc.
a or an
you can use or , otherwise, or rather than.
next
Like
ok
athletics
spectacular
hard
Forefather?
peter
demonstrate, employ, illuminate,