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2.
Has over 500 living languages
3.
Used to be part of Yugoslavia
4.
Has a population of less than one million
5.
Became independent in 1975
6.
Has the larger area of the two
7.
Is the wealthier of the two
9.
Has won a medal at the Olympic Games
10.
Its name means "black mountain"
11.
Is mostly covered in tropical rainforest
12.
Aluminium is one of its largest exports
14.
Used to be known as Zeta
15.
Shares an abbreviation with a widely used image file format