echo$sample | sed "s/#NB#/$nb/g" | sed "s/#ID#/$id/g" | sed "s/#SCIPER#/FAKE-$nb/g" | sed "s/#EMAIL#/$DEFAULT_EMAIL/g" | sed "s/#SEMESTER#/$SEMESTER/g" >> $DIR_EXAMS/$teacher/$FILE_STUDENTS
for dir_to_clean in $(echo"$DIR_EXAMS $DIR_BLANKS $DIR_SAMPLES $DIR_PDF $DIR_LIST_OUT"); do if[ -d $dir_to_clean]; then rmdir --ignore-fail-on-non-empty $dir_to_clean; fi; done