Another scheduling question....

I am trying to PD (also listed on the swap board), a 5 day at the end of May which starts on the 29th. I just noticed someone also has a drop up for a trip that starts the same date, but it is 4 days instead of 5, which I would like to pick up/SWP. Will SWP process two Qualifying (Q) trips in a swap? Reserve coverage is black for all the days involved, and they start on the same day except that my 5 day is a spill and the 4 day ends at the end of the bid period. Will SWP work in this case?