Test passes if both characters in each pair match. If you are missing a font glyph for a character, ignore that pair, but report which characters were ignored.
ἀ ἀ ἁ ἁ ἂ ἂ ἃ ἃ ἄ ἄ ἅ ἅ ἆ ἆ ἇ ἇ ἐ ἐ ἑ ἑ ἒ ἒ ἓ ἓ ἔ ἔ ἕ ἕ ἠ ἠ ἡ ἡ ἢ ἢ ἣ ἣ ἤ ἤ ἥ ἥ ἦ ἦ ἧ ἧ ἰ ἰ ἱ ἱ ἲ ἲ ἳ ἳ ἴ ἴ ἵ ἵ ἶ ἶ ἷ ἷ ὀ ὀ ὁ ὁ ὂ ὂ ὃ ὃ ὄ ὄ ὅ ὅ ὑ ὑ ὓ ὓ ὕ ὕ ὗ ὗ ὠ ὠ ὡ ὡ ὢ ὢ ὣ ὣ ὤ ὤ ὥ ὥ ὦ ὦ ὧ ὧ ᾀ ᾀ ᾁ ᾁ ᾂ ᾂ ᾃ ᾃ ᾄ ᾄ ᾅ ᾅ ᾆ ᾆ ᾇ ᾇ ᾐ ᾐ ᾑ ᾑ ᾒ ᾒ ᾓ ᾓ ᾔ ᾔ ᾕ ᾕ ᾖ ᾖ ᾗ ᾗ ᾠ ᾠ ᾡ ᾡ ᾢ ᾢ ᾣ ᾣ ᾤ ᾤ ᾥ ᾥ ᾦ ᾦ ᾧ ᾧ ᾰ ᾰ ᾱ ᾱ ὰ ὰ ά ά ᾳ ᾳ ὲ ὲ έ έ ὴ ὴ ή ή ῃ ῃ ῐ ῐ ῑ ῑ ὶ ὶ ί ί ῠ ῠ ῡ ῡ ὺ ὺ ύ ύ ῥ ῥ ὸ ὸ ό ό ὼ ὼ ώ ώ ῳ ῳ