$$$(shuf -n1 -e $(which ls) -l $(head -n6 /etc/passwd | tail -n1)) && $(which grep) $2

Run a random version of the 'ls' command with the sixth line of the '/etc/passwd' file as an argument, and then run the 'grep' command with the second argument.
echo "$$$(shuf -n1 -e $(which ls) -l $(head -n6 /etc/passwd | tail -n1)) && $(which grep) $2"