Undefined Character (U+1607F)

Plane:	Supplementary Multilingual Plane, U+10000 - U+1FFFF^[1]
HTML Entity:	`𖁿` `𖁿`
UTF-8 Encoding:	`0xF0 0x96 0x81 0xBF`
UTF-16 Encoding:	`0xD818 0xDC7F`
UTF-32 Encoding:	`0x0001607F`

References