Reorder Lines to Match

I've search for solutions to my problem and found a few that I thought might work, but they all seemed to be designed to do things slightly different than how I need them.

In the attached spreadsheet my data consists of columns A through K. Essentially I want to line up the data so Column E matches column K. When no data exists in the other section, then a blank line should be inserted. The example I gave has the data formatted the way I want it. As you can see, line 11 is blank. Column L can be ignored as my manual way to handle this was to create an if statement that returned "Error" when something didn't match.

My spreadsheet has 29,000 lines in it. So doing this with my IF statement method would take enormous amounts of time.

Any help would be appreciated!