ln --symbolic ../../bysemester/f12/ai.pdf  ../../byexam/ai/f12.pdf
  ln --symbolic ../../bysemester/f12/ca.pdf  ../../byexam/ca/f12.pdf
  ln --symbolic ../../bysemester/f12/db.pdf  ../../byexam/db/f12.pdf
  ln --symbolic ../../bysemester/f12/fc.pdf  ../../byexam/fc/f12.pdf
  ln --symbolic ../../bysemester/f12/gr.pdf  ../../byexam/gr/f12.pdf
  ln --symbolic ../../bysemester/f12/hci.pdf  ../../byexam/hci/f12.pdf
  ln --symbolic ../../bysemester/f12/net.pdf  ../../byexam/net/f12.pdf
  ln --symbolic ../../bysemester/f12/mp.pdf  ../../byexam/mp/f12.pdf
# ln --symbolic ../../bysemester/f12/na.pdf  ../../byexam/na/f12.pdf
  ln --symbolic ../../bysemester/f12/os.pdf  ../../byexam/os/f12.pdf
  ln --symbolic ../../bysemester/f12/pl.pdf   ../../byexam/pl/f12.pdf