how to print n words of context while searching text [closed]

by

If you can slurp whole input:

perl -e'undef$/;
        $a=<>;
        print "$_\n" for $a=~m/(?:\b\S+\b\s+){5}your regexp(?:\s+\b\S+\b){5}/sg
      ' <input

— 5 words of context.

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