890 - Find and Replace Pattern.

Medium

Given a list of strings words and a string pattern, return a list of words[i] that match pattern. You may return the answer in any order.

A word matches the pattern if there exists a permutation of letters p so that after replacing every letter x in the pattern with p(x), we get the desired word.

Recall that a permutation of letters is a bijection from letters to letters: every letter maps to another letter, and no two letters map to the same letter.

Example 1:

Input: words = "abc","deq","mee","aqq","dkd","ccc", pattern = "abb"

Output: "mee","aqq"

Explanation: "mee" matches the pattern because there is a permutation {a -> m, b -> e, ...}. "ccc" does not match the pattern because {a -> c, b -> c, ...} is not a permutation, since a and b map to the same letter.

Example 2:

Input: words = "a","b","c", pattern = "a"

Output: "a","b","c"

Constraints:

• 1 <= pattern.length <= 20

• 1 <= words.length <= 50

• words[i].length == pattern.length

• pattern and words[i] are lowercase English letters.