#include <stdio.h>
#include <iostream>
#include <string>
#include <algorithm>
#include <vector>
#include <set>
#include <map>
using namespace std;
int n;

int main() {
    //freopen("92A.txt", "r", stdin);
    int t; cin >> t;
    while (t--) {
        cin >> n;
        map <string, pair <int, int> > M;
        for (int i = 0; i < n; i++) {
            string s;
            int tmp;
            cin >> s >> tmp;
            if (M[s].first < tmp) {
                M[s].first = tmp;
                if (M[s].first > M[s].second) swap(M[s].first, M[s].second);
            }
        }
        int res = 0;
        for (map <string, pair <int, int> > :: iterator it = M.begin(); it != M.end(); it++) {
            res += it->second.second;
            res += it->second.first;
        }
        cout << res << endl;
    }
}