Undefined Character (U+16DD9)

Plane:	Supplementary Multilingual Plane, U+10000 - U+1FFFF^[1]
HTML Entity:	`𖷙` `𖷙`
UTF-8 Encoding:	`0xF0 0x96 0xB7 0x99`
UTF-16 Encoding:	`0xD81B 0xDDD9`
UTF-32 Encoding:	`0x00016DD9`

References