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  1. or download this
    use strict;
use warnings;
...
for my $id (sort keys %idData) {
    print "$id: $idData{$id}{name} size $idData{$id}{size}\n";
}
  2. or download this
    1: younggrasshopper13 size 23
2: GrandFather size 10
3: -- missing -- size 23
4: Mr. Unknown size -- missing --