In this challenge, orbit reads in the flag and seeds random off of it. While this is a challenge-specific detail, it is a broadly useful idea. It allows for the challenge's behavior to be dynamically dependent on the flag. This offers a similar paradigm to instanced challenge files. However, it is dynamically instanced, rather than statically instanced. Statically instanced values may be accessed by a student, while dynamically instanced values may not be (since they are dependent on the flag). Which style is appropriate depends on the specifics of the challenge.