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The history of the rupee traces back to 15th century , when the first " rupee " is believed to have been introduced by Sher Shah Suri ( 1486 – 1545 ) , based on a ratio of 40 copper pieces ( paisa ) per rupee .
 Sher Shah Suri
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Sher Shah Suri