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