use 5.010;
use warnings;
use Perl6::Form;
my $a = "a " x 100;
my $b = "b " x 100;
my $c = "c " x 100;
my $d = "d " x 100;
my $e = "e " x 100;
my $f = "f " x 100;
print form
'{:[[[[} {:[[[[} {:[[[[} {:[[[[[[[[[} {:[[[[[[[[[} {:[[[[}',
$a, $b, $c, $a, $b, $a;