+--> Fizika
  | | |--> 1.E
  | | |--> 2. E
  | | +--> 3.E
  | | `--> 4.E
  | | +--> 1A
  | | +--> 1C
  | | +--> 2A
  | | +--> 3A
  | | +--> 4A
  +--> TZK