Millisecond Forums

Hi! In my experiment i have to present pairs of words randomly, while changing the position (left / right) randomly as well. Like: good / bad, old / young, etc.For that purpose, i created 4 labels: PosLeft, PosRight, NegLeft, NegRightHow can I select the pairs randomly without repeating one pair ? I tried select = noreplacenorepeat, but it doesn't work properly. I think it's because for Inquisit good / bad is a differnent pair to bad / good. Do you guys have any idea how to achieve that? You can have a look at my code below.