Given an array of strings strs, group the anagrams together. You can return the answer in any order.

Example 1:

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

Explanation:

• There is no string in strs that can be rearranged to form "bat".
• The strings "nat" and "tan" are anagrams as they can be rearranged to form each other.
• The strings "ate", "eat", and "tea" are anagrams as they can be rearranged to form each other.

Example 2:

Output: [[""]]

Example 3:

Output: [["a"]]

Constraints:

• 1 <= strs.length <= 104.
• 0 <= strs[i].length <= 100.
• strs[i] consists of lowercase English letters.