63708
The custom was developed in medieval Livonia ( present-day Estonia and Latvia ) , and in early modern Germany where Protestant Germans brought decorated trees into their homes .
 Livonia, Estonia, Latvia, Germany
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Livonia, Estonia, Latvia, Germany