I don't think I ever spent that much time on one single day with Excel... And all of it just because somebody else messed up big time, all the while being fascinatingly undiscerning about it. There are moments I want to scream...! Then there are moments when I get another idea for a star.
I started working on it by hand and then realised it would probably take me about a week - which was madeningly frustrating again - so I looked for an easier solution... Here it was: