404 Not Found

Enjoy a randomly generated fortune:

$ fortune | cowsay

 ______________________________________
/ The following statement is not true. \
\ The previous statement is true.      /
 --------------------------------------
        \   ^__^
         \  (oo)\_______
            (__)\       )\/\
                ||----w |
                ||     ||

Here is the PHP code:

$output = shell_exec("/usr/games/fortune | /usr/games/cowsay");
echo $output;