If A2 and A3 lost those games, the pool play completion schedule is:
B4vA3
B4vA2
If B2 and B3 lost, there is only one pool play completion game:
the game between B2, B3, and B4 that did not happen on day 1.
If one team from pool A loses and one team from clipped pool B loses, the schedule is:
A vs. B4
B2/B3 vs. B4 (this is only played if it was not played on day 1. If it was played, skip this round)
A vs. B2/B3