Thanks a million for your answer. I suppose that this is independent of the total sample of 4096, all the ways you can arrange A and B, twelve by twelve. Since you are very knowledgeable, I want to...

For a particular problem, I have arranged the letters A and B twelve by twelve : AAAAAAAAAAAA, ABBAABBAAABA, and so on. Order matters: AB is not equal to BA. Altogether there are 2 raised to 12 or...