Forum Human Registration CP options

[محروم.كوم]

Hi all,
i have setted my forum registration with the questions and the match reply.

In the AdminCP/Human Verification, under the field "Regular Expressions" , there's the PCRE.

Must i add in that field for A-Z (alphabetics letters) replies this code?

^[A-Z]+$

Or can i add only the two letters A-Z ?

Again, for the numerics replies (example 5+2?)
must i add the code ^[A-Z0-9 ]+$ or can i add 1-100 ?

Sincerely i don't have never thinked to this , and don't would that was a reg problems with a not correct settings.....

In each case, the replies for my forum are all Alphanumeric, if i add this code for all the reply:
^[A-Z0-9 ]+$
I'll be ok? Adding the previous code , not there's differences for the case-sensitive replies , correct?

Thanks in advance __DEFINE_LIKE_SHARE__