This is the 809th most frequent Czech word.
balíčku
The Czech word "balíčku" means "package" or "parcel" (diminutive form).
The word "balíčku" here is used as a partitive form indicating a single package.
Našel jsem balíčku na schodech.
I found a package on the stairs.
The word "balíčku" in this case denotes a container for the items mentioned.
V balíčku byly různé suvenýry.
There were various souvenirs in the package.
Here, "balíčku" is used metaphorically to describe a compressed or summarized set of information.