DB<126> \%count
 => { 3 => 1, 5 => 1, 10 => 3 }

  DB<127> @list= %rcount= reverse %count
 => (3, 10, 3, 10)

  DB<128> \%rcount 
 => { 1 => 3, 3 => 10 }

  DB<129> \@list
 => [3, 10, 3, 10]