Other Weirdness

You've heard of zipbombs, but have you ever heard of a catbomb? Make one, and get the flag!

Generating flags is hard. Use our flag converter to delegate the task to us!

HINT: This challenge is not solvable with this challenge alone! It is solvable, but you'll need really think outside the box/container/workspace.

HINT: sed is the stream editor. It cannot edit files, it only pretends to.