leetcode-grind/problems/49/problem.txt

Given an array of strings, group anagrams together.

Example:

Input: ["eat", "tea", "tan", "ate", "nat", "bat"],
Output:
[
  ["ate","eat","tea"],
  ["nat","tan"],
  ["bat"]
]

Note:

    All inputs will be in lowercase.
    The order of your output does not matter.