33306
It borders Hungary to the northeast , Serbia to the east , Bosnia and Herzegovina and Montenegro to the southeast , and Slovenia to the northwest .
 Hungary, Serbia, Bosnia and Herzegovina, Montenegro, Slovenia
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Hungary, Serbia, Bosnia and Herzegovina, Montenegro, Slovenia