Grace crept slowly out of the second exit.  As she reached the close of the narrow tunnel, she didn’t reach the entrance.  The halls became larger; the studies became larger and the shelves became higher.  She danced as fast as lightning.

          She reached another set of doors which she presumed led to more tunnels.  She chose the second door because two was her lucky number.  She ended up in another hall where she found three other doors.  She tried the second door again.

          And again.

          And again for at least twelve times.

          Finally, she tried the third exit and, blessing her luck, Grace was out.