Rules are simple. I'll start by giving a 4 letter word, and the next poster changes one of those letters to form a new one. Example:
Poster1: Word
Poster2: Ward
Poster3: Warm
Poster4: Farm
Poster5: Firm
And so on. No one is allowed to repeat a word (the game will eventually end when no new words can be thought of). All words must be in English, and they must not be slang, names of people or places, or derogatory terms (falls under slang.)
First word:
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