In the book {{Oz|en}}, {{tok|[[jan Sonja]]}} used {{tp|nasin nanpa pona}} as the date format.Additionally,for the copyright year in {{tp|[[sitelen pona]]}}, shealso usedusing athe then-little-known numeric variant of {{tp|[[mute]]}} ({{sp|mute2}}), specifically for the sense of "twenty", composed of four glyphs for {{tp|luka}}.