0966. Vowel Spellchecker

https://leetcode.com/problems/vowel-spellchecker

Description

Given a wordlist, we want to implement a spellchecker that converts a query word into a correct word.

For a given query word, the spell checker handles two categories of spelling mistakes:

• Capitalization: If the query matches a word in the wordlist (case-insensitive), then the query word is returned with the same case as the case in the wordlist.

  • Example: wordlist = ["yellow"], query = "YellOw": correct = "yellow"

  • Example: wordlist = ["Yellow"], query = "yellow": correct = "Yellow"

  • Example: wordlist = ["yellow"], query = "yellow": correct = "yellow"

• Vowel Errors: If after replacing the vowels ('a', 'e', 'i', 'o', 'u') of the query word with any vowel individually, it matches a word in the wordlist (case-insensitive), then the query word is returned with the same case as the match in the wordlist.

  • Example: wordlist = ["YellOw"], query = "yollow": correct = "YellOw"

  • Example: wordlist = ["YellOw"], query = "yeellow": correct = "" (no match)

  • Example: wordlist = ["YellOw"], query = "yllw": correct = "" (no match)

In addition, the spell checker operates under the following precedence rules:

• When the query exactly matches a word in the wordlist (case-sensitive), you should return the same word back.

• When the query matches a word up to capitlization, you should return the first such match in the wordlist.

• When the query matches a word up to vowel errors, you should return the first such match in the wordlist.

• If the query has no matches in the wordlist, you should return the empty string.

Given some queries, return a list of words answer, where answer[i] is the correct word for query = queries[i].

Example 1:

**Input:** wordlist = ["KiTe","kite","hare","Hare"], queries = ["kite","Kite","KiTe","Hare","HARE","Hear","hear","keti","keet","keto"]
**Output:** ["kite","KiTe","KiTe","Hare","hare","","","KiTe","","KiTe"]

Example 2:

**Input:** wordlist = ["yellow"], queries = ["YellOw"]
**Output:** ["yellow"]

Constraints:

• 1 <= wordlist.length, queries.length <= 5000

• 1 <= wordlist[i].length, queries[i].length <= 7

• wordlist[i] and queries[i] consist only of only English letters.

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