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The Hardy – Littlewood maximal function In their original paper , G.H. Hardy and J.E. Littlewood explained their maximal inequality in the language of cricket averages .
 Hardy, Littlewood, G.H. Hardy, J.E. Littlewood
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Hardy, Littlewood, G.H. Hardy, J.E. Littlewood