Undefined Character (U+17DF)

Block:	Khmer, U+1780 - U+17FF^[1]
Plane:	Basic Multilingual Plane, U+0000 - U+FFFF^[1]
HTML Entity:	`៟` `៟`
UTF-8 Encoding:	`0xE1 0x9F 0x9F`
UTF-16 Encoding:	`0x17DF`
UTF-32 Encoding:	`0x000017DF`

References