+--> Fizika
  | | |--> 1e
  | | |--> 2e
  | | |--> 3e
  | | |--> 4e
  | | +--> 1A
  | | +--> 1C
  | | +--> 2A
  | | +--> 3A
  | | +--> 4A
  +--> TZK