Undefined Character (U+137A8)

Plane:	Supplementary Multilingual Plane, U+10000 - U+1FFFF^[1]
HTML Entity:	`𓞨` `𓞨`
UTF-8 Encoding:	`0xF0 0x93 0x9E 0xA8`
UTF-16 Encoding:	`0xD80D 0xDFA8`
UTF-32 Encoding:	`0x000137A8`

References