my @animals = qw [dog cat bird mouse rat snake horse cow
                  pig lizard lamb zebra lion elephant monkey];

my @scratch = @animals;

foreach my $animal (@animals) {
    for (my $j = @scratch - 1; $j >= @scratch - 3; $j --) {
        my $r = rand ($j + 1);
        @scratch[$j, $r] = @scratch[$r, $j];
        if ($scratch[$j] eq $animal) {
            my $r = rand ($j);
            @scratch[$j, $r] = @scratch[$r, $j];
        }
    }
    say "$animal @scratch[-3..-1]";
}