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Game Chatroom

Week 10

You are playing a vintage online game and notice that when people type certain messages, there is a colourful animation

When a message triggers the animation, you copy it, then try each word individually to see which word triggers the animation - here are some words you found that result in the animation

bad efface feed cab face beef dad cafe add accede bead facade fade decade ace

Your colleagues have been unable to spot the rule(s) that determine whether a word is or isn't valid - can you crack it?

From systematically trying each letter, you notice that single-letter words such as "a" are not accepted

The server the chatroom is hosted on is running Ubuntu, so you can assume they are using Ubuntu's list of english words - you should find all words that match the rule from this file

A reminder, if you are completely lost, hints will be released after 24 hours - or you can ask in the various social media groups at the bottom of the page

Hints

Hints will be released at the start of each of the following days - e.g. the start of day 3 is 48 hours after the challenge starts

Release Day Hint
2 Look at the letters in words that are accepted
3 It might even be useful to write down all of the letters that appear in these examples - how many are there and what is special about them?
4 You might have noticed they are all valid hexadecimal words - none of the words in this dictionary contain numbers, but these words all contain only the characters 'a' to 'f'
6
10 2026