It must match a string that starts and ends with the same vowel (i.e., {a, e, i, o, u}) code example
Example: match a string that starts and ends with the same vowel
const regex = /\b(?<vowel>[aeiou])(\w*\k<vowel>)?\b/
const regex = /\b(?<vowel>[aeiou])(\w*\k<vowel>)?\b/