Undefined Character (U+1F1F)

Block:	Greek Extended, U+1F00 - U+1FFF^[1]
Plane:	Basic Multilingual Plane, U+0000 - U+FFFF^[1]
HTML Entity:	`἟` `἟`
UTF-8 Encoding:	`0xE1 0xBC 0x9F`
UTF-16 Encoding:	`0x1F1F`
UTF-32 Encoding:	`0x00001F1F`

References