Printf : How to repeat characters?

[westrock2000]

I would like to use printf, but would also like to print a character multiple times. I cannot figure out the syntax

I have figured out you can do something like

printf ("%c" x 3,65,66,67);

Which will print ABC
But I what I would like to be able to do is something like AABBBCCCC

Normal print would just be as follows, but the commas throw me for a loop when it comes to printf.

$a = chr(65);
$b = chr(66);
$c = chr(67);
print ($a x 2, $b x 3, $c x 4);

Thanks