Group Anagrams

Problem statement

Group words that contain the same letters with the same frequencies. Return groups in the order their first member appears, and keep words inside each group in their original input order.

Your function

Implement this function and return the result. CodeSprint supplies each test case automatically.

Examples

words = ["eat","tea","tan","ate","nat","bat"]

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

words = [""]

[[""]]