[19] : bob's hat - 4 - 66 solves : crypto : Alice and Bob are close together, likely because they have a lot of things in common.  This is why Alice asked him a small *q*uestion, about something cooler than a wiener https://s3.amazonaws.com/bostonkeyparty/2016/b36f750ea5ea90f54b0f983d3c7ad9ce672bbd5a.zip