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( A => { count => 3, B => { count => 2, values => ["n1", "n2"] }, ... D => { count => 3, E => { count => 2, values => ["n2", "n4"] }, F => { count => 1, values => ["n1" ] } } )
my %hoh = ( A => { B => [ "n1", "n2" ], C => [ "n1" ] }, ... $hoh{$col1}{count} = $count1; }
my %hoh; ... D E n2 D E n4 D F n1