This is a test.
Only a test.
A test of your code.
  Some lines have white space
some are lowercase
1234 some have numbers
This line occurs multiple times. Make sure it shows up multiple times in the output, too.

some lines even were blank
% Make sure you leave out lines that start with %
%%%%%%%%%%%%%%%%%

some lines are the same length A
some lines are the same length C
some lines are the same length B
% some lines are the same length

This line occurs multiple times. Make sure it shows up multiple times in the output, too.
It doesn't matter what characters are on the line or how long it is.
I'm sure your code can sort them all.
!@%$#^&* (even if there are special characters)
really, don't go overthinking this one.
This line occurs multiple times. Make sure it shows up multiple times in the output, too.
%$#^&*
some lines are the same length %
some lines are the same length D