Undefined Character (U+12FFE)

Plane:	Supplementary Multilingual Plane, U+10000 - U+1FFFF^[1]
HTML Entity:	`𒿾` `𒿾`
UTF-8 Encoding:	`0xF0 0x92 0xBF 0xBE`
UTF-16 Encoding:	`0xD80B 0xDFFE`
UTF-32 Encoding:	`0x00012FFE`

References