Put a virtually real exam, with 4 test, 5 alternatives on each.
Many changes:

1) Renamed file to test_span.pl;
2) Wrote subroutines/functions to do most of the job;
3) Cleaned up *some* mess around.

To do:

Check the code for typos on output and clean up the remaining mess.
This files was renamed to test_span.pl as described on project README
file.