Question

I need to match a string which second letter is “a”, my current regex is:
^([^a-zA-Z]*[a-zA-Z][^a-zA-Z]*)a+
but this matches less than I need, I dont even know what It doesnt match but do you know where is the problem, or if there is a better way of doing this?
For example I need to match these:

"  kamcnn"
",.,ya..--/**+-00"
"0        0   q    a"

I match every string that I can imagine but Im still getting lower results than I should get.
EDIT: By “letter” I mean a character from [a-zA-Z] class.

Answer 1

Try this:

^[^a-zA-Z]*[a-zA-Z][^a-zA-Z]*a.*

This matches the entire string if the second ASCII letter is a:

^           # Start of string
[^a-zA-Z]*  # Match any number of non-letters
[a-zA-Z]    # Match one ASCII letter
[^a-zA-Z]*  # Match any number of non-letters
a           # Match an a
.*          # Match whatever follows