Millisecond Forums

I have four categories of text items, I'll call them groups A & B and 1 & 2. I want for the items to appear in word pairs, with four possible pairings: A1, A2, B1, B2. A's and B's should always be on top and 1's and 2's should always be on bottom when the words pairs are presented. Further, I want the pairings to appear randomly in different locations on the screen (doesn't really matter in how many different places, 3-4 would be fine).