Undefined Character (U+1E8FF)

Plane:	Supplementary Multilingual Plane, U+10000 - U+1FFFF^[1]
HTML Entity:	`𞣿` `𞣿`
UTF-8 Encoding:	`0xF0 0x9E 0xA3 0xBF`
UTF-16 Encoding:	`0xD83A 0xDCFF`
UTF-32 Encoding:	`0x0001E8FF`

References