use strict;
use warnings;
use Data::Dumper;

my %report;
my $nameCount=0;
my @names = map { $_.++$nameCount } ('Key', ) x 10; 
# Here the names will be Key1 to Key10, 
# But you should actually give explicit names with something like
# my @names = qw/Princess Leia Obiwan Kenobi Anakin Skywalker Darth Vader Han Solo/;

while (my $line = <DATA>) {
   my %fields;
   @fields{@names} = (split / /, $line); # Here we put the result into a slice of %fields
   foreach my $name (@names) {
      my $value = $fields{$name};
      $report{$name}{$value}++; # Auto vivification here, $report{$name} magically becomes a hashref      
   }
}

print Dumper \%report;

__DATA__
483 OS dx-32 1 charles list4 aardvark.com ty-off lx-on C 01
483 DS dx-14 1 james list3 23.456.12.7 ty-on lx-on B 01
769 XO dx-32 5 sully nolist widgets.com ty-on lx-on V 07