Okay, there are 3 S's and 4 A's.

--'s -- -------e--e --a- -a-'s -es- ---e-- -a---- -a--.

sammi - E(4) = 8
jackiesdaisy1935 - S(3) = 3
Logan - A(4) = 8

Letters left to choose from:
BCDFGHIJKLMNOPQRTUVWXYZ