(0) The 'Z' <= combined with a vowel could indicate a larger number than seven digits (base 8) long. Or a Nosov prefix.
Below the arrow bookmark.
(1) full stop.
(2) comma,
(3) bullet
(4) octodecimal mark.
(5) opening and closing ¿question marks?
(6) opening and closing ¡exclamation marks!
(7) opening and closing ¡¿interrobang marks!?