HINT: A star-shaped set is connected. A $+$ sign is star-shaped. Find a way to position two of them so that the intersection is a two-point set.

Is the intersection of two star-shaped sets star-shaped?
When I try to paste code in Trello, I get very weird formatting after saving, but it seems like it does format for code, I just can't get it to work right. What is the best way to paste code into Trello?

Currently I'm just putting links to Gist, but I would prefer to just paste it straight in there.
