| | `--> 4r
  | | |--> 1.c
  | | `--> 1.e
  | | | +--> 1.D
  | | | +--> 3.AB
  | | | +--> 3.E
  | | | +--> 4.C
  | |   +--> 3.C
  | |   +--> 4.ACD
  | | `--> proba1
  | | ---> Etika
  | | | |--> Pehar
  | | | `--> Prsten
  | | +--> Logika
  | | | `--> Logika