Which words mean a rare boost from Sayo?

[Lucky 777]

I have been trying to get an Item out of stingies for the longest and they have me sick of the plains theme so I was wondering what letters mean I've got a boost in drop rate?

Also I did 1337 damage on a Polty lol.

[Mike]

レアドロップ率＋〇〇％

where the big circles are a number between 3 and 15.

[Lucky 777]

Thanks a lot I always thought was the one with the smallest letters In a way I was hoping I was wrong.

[RemiusTA]

does anything have a translation of everything you can get from her?