Untitled

class Solution {
public:
    vector < string> findUncommonWords(string s1, string s2) {
        s1+=' ';
        s1+=s2;
        unordered_map < string , int > mp;
        vector < string > ans;
        stringstream s1s(s1); 
        stringstream sCopy1s(s1);

        string token; 
        char delimiter = ' '; 
    
        while (getline(s1s, token, delimiter)) { 
            mp[token]++;
        }
        
        while (getline(sCopy1s, token, delimiter)) { 
            if(mp[token] == 1)ans.push_back(token);
        }

        return ans; 
    }
    vector<string> uncommonFromSentences(string s1, string s2) {
        return findUncommonWords(s1, s2);
    }
};