Need help with something easy but I can't seem to come up with elegant solution. I attached a file with input and output I am looking for. Basically trying to take the 3 most recent dates from data in INPUT (jul/aug/sep) and filter so that each Num (column
must contain the 3 dates. In my example, only Num values 1 and 5 should come through and 2,3,4 should be left out.
Thanks in advance!