puzzle piece 3D puzzle piece 3A 3G
3J puzzle piece 3B puzzle piece 3C
3F 3I 3E

well, fun story about this one! i spent an hour being unable to make the code display anything but a blank page, which resulted in a near-breakdown about how i wouldn't be able to graduate and how i was about to lose my whole future to flexbox. then, after no less than 8 computer science majors looked at it, we discovered that i just didn't close the title tag. so that was cool.