In Belgrade,
gymnazium (4), Bachelor(5), and Master(3) studies
were lasting 12 years when he was young
(in mid to late 60s and 70s).

Each winter he studied a language from a book,
and in summer he worked on simple physical jobs,
or attended conferences,
in countries where the target languages were spoken:

Picking strawberies in England
Helping farmers in Germany
Picking cabbage in Sweden
Attending conferences in Holland

Helping farmers in Italy
Simple help in Spain
Washing dishes in France
Attending a conference in Portugal

Ice work in Serbia (native)
Repairing TV sets in Poland (ZURT)
Youth exchange in Russia
Attending conferences in Czeck Republic