3. Trading Outage On a given day, Akuna makes at least one trade each second. However, there is a blip - a temporary outage - on the exchange side such that some trades are m issing. You will be given the raw trade timestamps from the exchange as a list of strings. Find and return the trades immediately before and after the outage, separated by a dash. Assume input timestamps may not be sorted, and there may be multiple trades in a single second.
