very simple problem, but I can't get accepted!

for example, what to do with empty lines??
does the first met empty line means the end of input of not?
should I output the last empty line or not?
the sample input does not contain empty lines at all, is it
possible??

My program passed this problem easily. As I know, it's
better to use just Read(ch). Don't use ReadLn. And the
empty lines don't indicate the end of file. And there may
be some other characters with ASCII below #32. You should
judge then yourself instead of ReadLn.
Hope that this is useful.