@Julijana, wow, that's great - I doubted it would be him, because you wrote they haven't been in touch for years, so I assumed this Adam must be a grandpa already or sth ;) It's good that it crossed my mind to mention him, who would've thought...
Btw, out of curiosity, if you don't mind telling - is your dad Polish?
An amazing man
Indeed, your dad has one interesting friend :)))