find . -type f -exec grep -q 500 {} \; -print Prints the same list of files as grep -l 500 * , but in a different order; doesn't pass the challenge. Also, gre

find . -type f -exec grep -q 500 {} \; -print Prints the same list of files as grep -l 500 * , but in a different order; doesn't pass the challenge. Also, grep -Il 500 * doesn't include README, for some reason. file README doesn't work :-(