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#!/usr/bin/perl -w
use strict;
...

delimiter ' '
<Bart><Lisa><Maggie><Marge><Homer>

  As a special case, specifying a PATTERN of space
  ("' '") will split on white space just as "split"
...
  leading whitespace produces a null first field.  A
  "split" with no arguments really does a 
  "split(' ', $_)" internally.

perl -MO=Deparse -e '$_=" a b c ";print map {"<$_>"} split'
$_ = ' a b c ';
print map({"<$_>";} split(" ", $_, 0));