How should I practice Generate Palindromic Permutations?

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Generate Palindromic Permutations

Motive● MediumFULLTIMEONSITE INTERVIEW

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Problem statement

Given a lowercase English string s, return every distinct palindrome that can be formed using all of its characters, in lexicographic order. Return an empty array when none exists.

Function

generatePalindromes(s: String) → String[]

Examples

Example 1

s = "aabb"return = ["abba","baab"]

Example 2

s = "abc"return = []

Constraints

1 <= s.length <= 14.
s contains lowercase English letters only.