88866
As the route traverses hilly terrain , it requires a substantial number of viaducts and tunnels , as well as two major bridges to span the Drava and Mura rivers .
 Drava, Mura
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Drava, Mura