<Below this line, describe in what way does your code behave incorrectly? Include ALL error messages.>
just look ! i don’t understand !
someone can help me it’s cool !
<Below this line, add a screenshot of your whole web browser so that we can see what you see.>
If you search for the substring “atnuhaoehutnhaotnuhtnaouhtna” then you’ll get 0 results. Does that mean grep isn’t working? I call that working very well, because there are 0 matches, so printing them all means producing exactly no output.
To get a result you can add that substring to one of the files, or perhaps search for something that is in the files.