sentences:  U+2075 (⁵) have their own Unicode code points.Canonical normalization (NF) does not affect any of these, but compatibility normalization (NFK) will decompose the ffi ligature into the constituent letters, so a search for U+0066 (f) as substring would succeed in an NFKC normalization of U+FB03 but not in NFC normalization of U+FB03.Likewise when searching for the Latin letter I (U+0049) in the precomposed Roman numeral Ⅸ (U+2168).