Blackjack Count Analyzer

In Blackjack Count Analyzer(or blackjack analyzer, bja.exe), there are symbols in the Strategy tables. Can anyone tell me what they are?

+ - / D d X e f 3 4

Here are my guesses:
+=hit
-=stay
/=split
D=double
d=?
X=surrender
e=?
f=five card
3=3 card hit
4=4 card hit