Dear Masters,

How can I modify my code below. Such that given $tpl, I can remove the recurring consecutive alphabet,
B-B into just B, and A-A into just A?

Is there a better way to implement it?
Also could it be made faster?
My current wrong answer and the intended result is shown below.
Update: Typo corrected. Thanks to skillet-thief .

use Data::Dumper;

my $tpl = ['A -4 B','B -4 C','C -4 A','A -4 B'];
get_alphb_fr_tpl($tpl);

sub get_alphb_fr_tpl
{
  my $aref = shift;
  my @str  = grep (!/[\d+\s+]/,map{ split " ",$_} @{$aref}) ;
  print Dumper \@str ;
  return;
}
[download]

Such that it gives:

$VAR1 = ['A','B','C','A','B'];
[download]

Instead of:

$VAR1 = ['A','B','B','C','C','A','A','B'];
[download]

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