Just some random code to refresh my small knowledge on PERL.
Excluded entrada.tex and made a new sample file named master.tex
This version is capable of permutation of questions.

TODO: write functions for doing this and write alternatives permutation within each question. To clean up all the mess on the code, of course.
Just removed this files: entrada.tex was replaced by master.tex and saida.txt was related to random code at experiments.pl