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At the age of eight , Khryukin began working for well-off cossacks , but eventually ran off , spending several years wandering the countryside in the years preceding the Bolshevik Revolution .
 Khryukin
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Khryukin