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The modern bassoon exists in two distinct primary forms , the Buffet ( or " French " ) system and the Heckel ( " German " ) system .
 Buffet, Heckel
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Buffet, Heckel