Undefined Character (U+187FF)

Block:	Tangut, U+17000 - U+187FF^[1]
Plane:	Supplementary Multilingual Plane, U+10000 - U+1FFFF^[1]
HTML Entity:	`𘟿` `𘟿`
UTF-8 Encoding:	`0xF0 0x98 0x9F 0xBF`
UTF-16 Encoding:	`0xD821 0xDFFF`
UTF-32 Encoding:	`0x000187FF`

References