In Microsoft Windows 10, as of 2017-02-27, the 3 interesting characters
are censored! That is, Microsoft's font
“Segoe UI Historic”
shows a blank squares.
What Does it Mean?
So, Egyptian Hieroglyph is a mixture of phonogram (phonetic reading), logogram (picture), and ideogram (semantic reading)
Visually, hieroglyphs are all more or less figurative: they represent
real or illusional elements, sometimes stylized and simplified, but all
generally perfectly recognizable in form. However, the same sign can, according
to context, be interpreted in diverse ways: as a phonogram (phonetic reading),
as a logogram, or as an ideogram (semagram; “determinative”) (semantic
reading). The determinative was not read as a phonetic constituent, but
facilitated understanding by differentiating the word from its homophones.