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  1. or download this
    # Global mode (pretty slow on large files)
$_=q qrea ncJertsa ,thelhPkour q,my $i=length;
while($i){s/(.{$i})(.)/$2$1/g;--$i}print+$_.$/
  2. or download this
    # Non-global
$_=q qnPteorJlt  hhascekaerru, q,my $i=length;
while($i){s/(.{$i})(.)/$2$1/;--$i}print+$_.$/;
  3. or download this
    # Opposite code:
$_=q qJust another Perl hacker,q;until($i eq
length){s/(.)(.{$i})/$2$1/g;++$i}print+$_.$/