Assuming there is a taaroves, perhaps one could argue that there is no real pesoles here. Rather, you are just sorting out the cards into categories, making this a miyun case. I think we assume, based on the Rambam, that miyun is assur if it's not l'atlar, but permitted if it's for immediate use - which would be the case here (see Biur Halacha 319:3).
For example, if your rice got mixed together with the beans on your plate and you want to eat both of them now but you don't like them mixed together, my understanding is that you can separate them and eat them separately (ochel mitoch ochel, l'atlar, b'yad).