We run a year-long 'Capture The Flag' (CTF) which is built into all of our sessions and workshops.
Throughout the year, you will solve challenges which will have tokens as a reward; we call these tokens "flags". They are hidden in various places in our sessions and also in other locations; some are obvious, some are not, and some are hidden in plain sight.
All our flags are in the format like
You can find the tracker at https://flags.sucss.org