I downloaded a project from web.When building the project it produces output files in folder named **Output**.The problem is there are many folders with same name.I need to manually delete the files in all output directories.

I used this command

 find . -type d -name "output" -print

It displays the location of all directories with same name.

Then i used this command 

 find . -type d -name "output" -delete

>find: cannot delete ‘./output’: Directory not empty

I don't want to delete the output folder i want to delete all the files under the output folder name.