389470
A variant of the SFR-39 , the SRF-39FP , has a transparent exterior designed to thwart contraband concealment , and the radio accordingly often appears on the commissary lists of U.S. federal prison s , hence the " FP " suffix .
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Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
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