C++ sorting - special characters after normal letters

I have a vector of strings which is holding strings like

BB
aA
12
b
AA
&
[
**
1

Using the default sort() with C++ I am given this sorted list

&
**
1
12
AA
BB
[
aA
b

Instead of that, I need it to be ordered with the normal letters A, a, B, b.... coming first, those followed by 0-9 and finally all that being followed by the "special" characters like *, [, , ~, !.... in their normal ASCII order.

I really have no idea how to go about changing the way that the vector is sorted in order to make sure that it is all in that order. Thanks.