| | +--> 1D
  | | |--> 2C
  | | +--> 2D
  | | |--> 3C
  | | |--> 3D
  | | `--> 4C
  |   |--> 1c
  |   |--> 1e
  |   |--> 3d
  |   |--> 3e
  |   |--> 4a
  |   |--> 4b
  |   |--> 4c
  |   `--> 4e
  +--> Fizika
  +--> TZK