Û Ø Ù Ø Ø Ù Ø Ø Ø Ù ) is a country located in South-central Asia . Afghanistan ( ; Ø Ù Ø Ø Ù Ø Ø Ø Ù afÄ Ä nistÄ n ) , officially the Islamic Republic of Afghanistan , is a landlocked and mountainous country in south-central Asia .