0nbrv4 1nbr 2nbrv 3nbrv4 4nbr

pecr qecrv recrv4 secr tecrv

e5crv f5crv4 g5cr h5crv i5crv4

3vdrv4 4vdr 5vdrv 6vdrv4 7vdr

smer tmerv umerv4 vmer wmerv