Check CSS for Title Requirements

I think I figured out the CSS for what I'm looking for, but wanted someone to check it over. A subreddit I manage has a rule that post flaired "Advice/Career" must start with the posters country of origin in brackets, e.g. "[USA] Grad School Options for Comparative Psych?". I am trying to make an auto-mod rule to remove post that don't have the country bracketed at the beginning. Is this the proper css for this action? UC Browser
Will making "[" one of the possible options for bracketing throw off the automod? SHAREit

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