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  1. or download this
    foreach (sort { $a <=> $b } keys %hash) { push @c, \@{$hash{$_}}; }
  2. or download this
    @c = map { 
  \@{ $hash{$_} }
} (sort { $a <=> $b } keys %hash);
  3. or download this
    push @c, map { 
  \@{ $hash{$_} }
} (sort { $a <=> $b } keys %hash);