This is the 8582nd most frequent Polish word.
przemek
"Przemek" is a diminutive form of the Polish male name "Przemysław," which means "someone who uses their mind or is thoughtful."
In this sentence, 'Przemek' is used as a proper noun, specifically a male given name, referring to an individual named 'Przemek'.
Przemek ma się dziś dobrze.
Przemek is doing well today.
Here, 'Przemka' is the accusative form of the name 'Przemek', used when the person named Przemek is the direct object of the verb 'Spotkałem' (I met).
Spotkałem Przemka wczoraj na ulicy.
I met Przemek yesterday on the street.
In this usage, 'Przemek' has the role of a subject in the sentence, indicating the individual who performed the action of writing.