Sje
Sje is a letter of the Cyrillic alphabet, formed from С with the addition of an acute accent. It is used in the Montenegrin alphabet, where it represents the voiceless alveolo-palatal sibilant.
It corresponds to the Latin Ś, and is not to be confused with the Latin Ć, which represents the voiceless alveolo-palatal affricate /t͡ɕ/Being a relatively recent letter, not present in any legacy 8-bit Cyrillic encoding, the letter С́ is not represented directly by a precomposed character in Unicode either; it has to be composed as С+◌́.