Vowel Spellchecker

966. Vowel Spellchecker

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.

  <ul>
  	<li>Example: <code>wordlist = ["yellow"]</code>, <code>query = "YellOw"</code>: <code>correct = "yellow"</code></li>
  	<li>Example: <code>wordlist = ["Yellow"]</code>, <code>query = "yellow"</code>: <code>correct = "Yellow"</code></li>
  	<li>Example: <code>wordlist = ["yellow"]</code>, <code>query = "yellow"</code>: <code>correct = "yellow"</code></li>
  </ul>
  </li>
  <li>Vowel Errors: If after replacing the vowels <code>('a', 'e', 'i', 'o', 'u')</code> of the query word with any vowel individually, it matches a word in the wordlist (<strong>case-insensitive</strong>), then the query word is returned with the same case as the match in the wordlist.
  <ul>
  	<li>Example: <code>wordlist = ["YellOw"]</code>, <code>query = "yollow"</code>: <code>correct = "YellOw"</code></li>
  	<li>Example: <code>wordlist = ["YellOw"]</code>, <code>query = "yeellow"</code>: <code>correct = ""</code> (no match)</li>
  	<li>Example: <code>wordlist = ["YellOw"]</code>, <code>query = "yllw"</code>: <code>correct = ""</code> (no match)</li>
  </ul>
  </li>
  

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.