N and O:

"-e-. ---e ---o-en---. -o- -no-, -eo--e --o -a-- -n --o-en -a-e- --- -e- -e---e-. -o- -o--- --ee-- -e ---- -o-- --ea--, -a--. -'-e -een -o- -o -- a --n--e- ---e-. An- --en -- -o--- -oo- ---e - -a- -ea-, an- -o- -o--- -a-e -- -o--..."


Lois: You know, I have a funny feeling that you didn't tell me your biggest secret.

Clark: Well, just to put your little mind at ease, Lois, you're right.
Ides of Metropolis