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my %hash; while ( <DATA> ) { ... 200326951|_|rel_Access1|_|200315786|_| 200326951|_|rel_Access2|_|200315482|_| 200326951|_|rel_Access2|_|200315786|_|
$VAR1 = { '200326951' => { ... 'rel_Access1' => '200315786' } };