Try to guess 20 first level administrative subdivision capitals (both in Serbia and other countries) closest to Sombor.
For practical reasons, I'll make some exceptions:
For Slovenia and Northern Macedonia, only largest city in every statistical region is included.
For Luxembourg, Liechtenstein, San Marino and Andorra, only country capital and largest municipality seat are included.
If some subdivision capitals are omitted but should be included, please let me know in the comments.
If speakers of languages that don't use latin script consider I should include different transliteration of city names, please let me know.
Evil aliens have decided to kill everyone on Earth! Fortunately, they've given you two minutes to save as many as you can. All you have to do is name a country to save everyone in it.