Accent Art: Small Wall Mural
^ (caret or circumflex accent) followed by any one of the characters [][a. The six-letter word "résumé" should look like "resume" with an "/" accent on each "e". "a\n{combining acute accent}" is not in nfc (its nfc is "\n{latin capital letter a with acute}"), while "b\n{combining acute accent}" is in nfc.
Nunez - demo how to use the uca for accent-insensitive searching uses of unicode in perl identifiers in oscon scripts a few use unicode not just in literals, but in identifiers, too: