Just in case you wonder, there are much more fonts that contain glyphs for monotonic Greek that for polytonic Greek.
==Monotonic Accent and Acute Accent==
Although the monotonic accent was acute, Unicode defines a pair of characters for monotonic accented vowels and polytonic acute accented vowels (both uppercase and lowercase and with diairesis).
This are the different characters in lowercase:
<pre>
ά έ ή ί ΐ ό ύ ΰ ώ
ά έ ή ί ΐ ό ύ ΰ ώ
</pre>
=Ancient Greek=