Undefined Character (U+1E63F)

Plane:	Supplementary Multilingual Plane, U+10000 - U+1FFFF^[1]
HTML Entity:	`𞘿` `𞘿`
UTF-8 Encoding:	`0xF0 0x9E 0x98 0xBF`
UTF-16 Encoding:	`0xD839 0xDE3F`
UTF-32 Encoding:	`0x0001E63F`

References