Any backslashed prototype character represents an actual argument that
  absolutely must start with that character.  The value passed as part of
  @_ will be a reference to the actual argument given in the subroutine
  call, obtained by applying "\" to that argument.

##</code><code>##

my (@age_r, %home_r) = user(@age,%home);

##</code><code>##

s**lil*;  $*=join'',sort split q**;  s;.*;grr; &&s+(.(.)).+$2$1+; $; =
qq-$_-;s,.*,ahc,;$,.=chop for split q,,,reverse;print for($,,$;,$*,$/)