Split string to List<string> with Linq

I'd like avoid loop

I have this :

string s = "AAAA,12,BBBB,34,CCCCC,56";

With Linq, I'd like to have 2 List

In the first : AAAA, BBBB and CCCCC

In the second : 12,34 and 56

It's not based on numeric or not numeric.

Thanks,