+--> Fizika
  | +--> 4.A
  | |--> 4.B
  | |--> 4.C
  | |--> 4.D
  | |--> 4.E
  | | |--> 1C
  | | |--> 2C
  | | |--> 4A
  | | |--> 4C
  +--> TZK