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  1. or download this
    $ echo abcd | perl -nle 'print "=$1=" while /(^|\w?)/g;'
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...
=c=
=d=
==
  2. or download this
    $ echo abcd | perl -nle 'print "=$1=" while /(\w??)/g;'
==
...
==
=d=
==
  3. or download this
    --
@/=map{[/./g]}qw/.h_nJ Xapou cets krht ele_ r_ra/;
map{y/X_/\n /;print}map{pop@$_}@/for@/