Re: How can I count the number and kinds of letters at 1st, 2nd and 3rd positions of 3-letter words in a string?

[NetWallah]

Build and print a Hash of Arrayrefs like this:

my ($i,%x);
$i=0;
$x{$_}[$i++%3]++ for split //, $a;

for my $k (sort keys %x){
  my $aref = $x{$k};
  print "$k ";
  print for @$aref;
  print $_;

}

(untested)