I'm not sure how boo_radley counted 54 - it's actually 60. You count only the characters inside the sub. You should also add three characters to reset @r (thereby making this sub usable more than once).

Anyway, here's a solution at 54:

sub c{($t,$p)=@_;map{$t-=($x=int$t/$_)*$_;($_)x$x}reverse@$p}
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   MeowChow                                   
               s aamecha.s a..a\u$&owag.print