DB<123>  $str =join '', a..h
 => "abcdefgh"
 
  DB<124> ( undef, undef, undef, undef , @rest) = split //, $str
 => ("a", "b", "c", "d", "e", "f", "g", "h")
 
  DB<125> @rest
 => ("e", "f", "g", "h")