Really struggling to understand what this quiz wants lol. At first I thought it meant adjacent cells where the corner is on the right in one and on the left in the other, but that didn't work. Then I thought maybe you need the corner in the top left, then top right, then bottom left and finally bottom right (just that they have to come in adjacent pairs). That didn't work either. Groups of 4 cells which together form the 4 corners of squares maybe? Nope lol. Also not sure on how far the adjacency condition extends etc. I'm lost! Bet it's obvious as well haha