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nan nan nan nan nan nan nan nan nan nan nan nan nan nan nan nan nan nan nan nan nan nan nan nan nan nan nan nan nan nan nan nan nan nan nan nan nan nan nan nan nan nan nan nan nan nan nan nan nan nan nan nan nan nan 40 40 40 40 40 40 40 40 40 40 41 41 41 41 41 41 41 41 41 41 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 40 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 41 40 40 40 41 41 41 41 41 42 42 43 43 43 43 43 43 43 43 43 44 44 44 44 44 45 46 47 47 47 46 46 45 45 44 43 42 41 41 41 41 41 42 42 42 42 42 42 43 42 42 42 41 41 41 41 41 42 42 42 42 43 42 42 42 42 42 42 42 42 42 42 42 42 42 43 nan nan nan 45 45 46 46 46 46 45 45 45 44 nan nan nan nan 43 43 42 43 44 45 46 46 47 47 47 47 47 47 48 48 48 47 47 47 47 47 47 47 47 46 46 47 nan nan nan nan nan nan 49 49 49 49 50 50 50 50 50 50 50 49 49 49 50 50 50 50 49 50 50 51 51 51 51 50 50 50 50 50 51 nan nan nan nan nan nan nan nan 52 nan nan nan nan nan nan nan nan nan nan nan nan nan nan nan 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