class Solution {
public:
    vector<vector<string>> groupAnagrams(vector<string>& strs) {
        unordered_map<string, vector<string>> map1;
        vector<vector<string>> result;

        for(string str : strs){
            string key = str;
            sort(key.begin(), key.end());
            map1[key].push_back(str);
        }

        for(auto it = map1.begin(); it != map1.end(); it++){
            result.push_back(it->second);
        }

        return result;
    }
};