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field=a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b 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x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b x x c a x x b x x x a x b x x x x x a b 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