Enter any image where the predominant colors are yellow and blue. Both colors must be present, it does not matter if these are not the only colors as long as you think the viewer can see an emphasis on yellow and blue. Warmer or cooler shades of these colors are acceptable.
If you are new and do not know the user id and password, please send an email to
CTF2008(-at-)grad.com
Please replace(-at-) with @ in the email address before you send it out. One of
the challenge administrators will contact you with that information, but please be patient. Thanks.