| | +--> 1b
  | | +--> 2c
  | | `--> 4d
  +--> Fizika
  | | ---> PAU
  | | | +--> 2E
  | | | +--> 3E
  | | | +--> 4E
  | | +--> SJZ
  | | |--> 1e
  | | |--> 2e
  | | |--> 3e
  | | |--> 4e
  +--> TZK