$func Chars-To-Bytes e.Int  = e.Char;
$func Bytes-To-Chars e.Char = e.Int;
$func To-Lower       e.Char = e.Char;
$func To-Upper       e.Char = e.Char;

$func? To-Int    e.Exp  = s.Int;
$func  To-Chars  e.Exp  = e.Char;
$func  To-Word   e.Exp  = s.Word;