6.3 – irregular genitive sg. destinations
most masculine inanimate hardstem nouns will have the ending -u for the genitive singular:
do parku
to the park
do obchodu
to the store
les ‘forest’ and kostel ‘church’, as well as nouns ending in -ín/-ýn such as Berlín or Londýn and -ov, such as the Polish city Krakov ‘Krakow’ or the German city Mnichov ‘Munich’.
do lesa
to the forest
do kostela
to church
do Mnichova
to Munich
do Londýna
to London