#include <bits/stdc++.h>

using namespace std;

#define PII pair<int,int>
#define pb push_back
#define all(x) (x).begin(), (x).end()

using ll = long long;
using ull = unsigned long long;

void solve() {
    int n;
    cin >> n;
    map<pair<string,char>, int> mp;
    string s1, s2;
    char c;
    while(n--) {
        cin >> s1 >> c >> s2;
        if(s2 == "accepted") {
            mp[{s1, c}] ++;
        }
    }   
    char ans = 0;
    int mx = -1;
    map<char, int> mp2;
    for (auto [x,y] : mp) {
        mp2[x.second] ++;
        if(mp2[x.second] > mx) {
            ans = x.second;
            mx = mp2[x.second];
        }
    }
    cout << ans << '\n';
}

int main() {
    ios::sync_with_stdio(false);
    cin.tie(nullptr);

    int tt;
    cin >> tt;
    while (tt--) {
        solve();    
    }

    return 0;
}