Why do we have to hide from the police, daddy ? 
  Because they use emacs and we use vi, son.
Why do we have to hide from the police, daddy ? 
  Because they use vi and we use emacs, son.   

##</code><code>##

print "Why do we have to hide from the police, daddy ?\n  Because they use $_->[0] and we use $_->[1], son.\n" 
  for ($_,reverse @$_) for (["emacs","vi"])

##</code><code>##

do {
  foreach ($_, [reverse @$_]){print "Why do we have to hide from the police, daddy ?\n  Because they use $_->[0] and we use $_->[1], son.\n"}
} for (["emacs","vi"])'