As character names:

U+AADF TAI VIET SYMBOL KOI KOI character (꫟)

As raw characters:

꫟

As a string of HTML entities:

꫟

Decoder output:

Byte number 1 is decimal 240, hex 0xF0, octal \360, binary 11110000
This is the first byte of a 4 byte sequence.

Byte number 2 is decimal 138, hex 0x8A, octal \212, binary 10001010
This is continuation byte 1, expecting 2 more.

Byte number 3 is decimal 171, hex 0xAB, octal \253, binary 10101011
This is continuation byte 2, expecting 1 more.

Byte number 4 is decimal 159, hex 0x9F, octal \237, binary 10011111
This is continuation byte 3, expecting 0 more.

U+AADF	TAI VIET SYMBOL KOI KOI
	* marks end of text in songs and poems