さ

あ

interjection

1. come (on), come now, come along, here. Used to urge or encourage others.
2. all right, right, okay, now, here goes. Indicates resolve.
3. well, hmm, uh, let's see, I'm not sure. Indicates uncertainty or hesitation.
4. here, now, there (we go), ah, oh. Said when something arrives, starts, finishes, etc..
5. about that, ..., actually, .... Used when interrupting someone.