//
// Created by 2 on 2024/9/15/015.
//
#include <bits/stdc++.h>

using namespace std;

#define all(a) a.begin(), a.end()
#define pb push_back
#define eb emplace_back
#define IOS ios::sync_with_stdio(false); cin.tie(0)
#define endl '\n'

using pii = pair<int, int>;
using ll = long long;
const int N = 2e5 + 10;
const int mod = 1e9;
const ll MAX = 1e18;

void solve() {
    int n;
    cin >> n;
    string s, y;
    char x;
    set<string> st[26];
    for (int i = 0; i < n; ++i) {
        cin >> s >> x >> y;
        if (y == "accepted")
            st[x - 'A'].insert(s);
    }
    int mx = 0;
    for (const auto &item: st)
        mx = max(mx, ssize(item));

    for (int i = 0; i < 26; ++i)
        if (st[i].size() == mx) {
            cout << i + 'A' << endl;
            return;
        }
}

int main() {
    IOS;
    int t = 1;
    cin >> t;
    while (t--)
        solve();
    return 0;
}

answer.code: In function ‘void solve()’:
answer.code:33:17: error: no matching function for call to ‘max(int&, std::common_type_t<long int, long int>)’
   33 |         mx = max(mx, ssize(item));
      |              ~~~^~~~~~~~~~~~~~~~~
In file included from /usr/include/c++/13/algorithm:60,
                 from /usr/include/x86_64-linux-gnu/c++/13/bits/stdc++.h:51,
                 from answer.code:4:
/usr/include/c++/13/bits/stl_algobase.h:257:5: note: candidate: ‘template<class _Tp> constexpr const _Tp& std::max(const _Tp&, const _Tp&)’
  257 |     max(const _Tp& __a, const _Tp& __b)
      |     ^~~
/usr/include/c++/13/bits/stl_algobase.h:257:5: note:   template argument deduction/substitution failed:
answer.code:33:17: note:   deduced conflicting types for parameter ‘const _Tp’ (‘int’ and ‘std::common_type_t<long int, long int>’ {aka ‘long int’})
   33 |         mx = max(mx, ssize(item));
      |              ~~~^~~~~~~~~~~~~~~~~
/usr/include/c++/13/bits/stl_algobase.h:303:5: note: candidate: ‘template<class _Tp, class _Compare> constexpr const _Tp& std::max(const _Tp&, const _Tp&, _Compare)’
  303 |     max(const _Tp& __a, const _Tp& __b, _Compare __comp)
      |     ^~~
/usr/include/c++/13/bits/stl_algobase.h:303:5: note:   template argument deduction/substitution failed:
answer.code:33:17: note:   deduced conflicting types for parameter ‘const _Tp’ (‘int’ and ‘std::common_type_t<long int, long int>’ {aka ‘long int’})
   33 |         mx = max(mx, ssize(item));
      |              ~~~^~~~~~~~~~~~~~~~~
In file included from /usr/include/c++/13/algorithm:61:
/usr/include/c++/13/bits/stl_algo.h:5795:5: note: candidate: ‘template<class _Tp> constexpr _Tp std::max(initializer_list<_Tp>)’
 5795 |     max(initializer_list<_Tp> __l)
      |     ^~~
/usr/include/c++/13/bits/stl_algo.h:5795:5: note:   template argument deduction/substitution failed:
answer.code:33:17: note:   mismatched types ‘std::initializer_list<_Tp>’ and ‘int’
   33 |         mx = max(mx, ssize(item));
      |              ~~~^~~~~~~~~~~~~~~~~
/usr/include/c++/13/bits/stl_algo.h:5805:5: note: candidate: ‘template<class _Tp, class _Compare> constexpr _Tp std::max(initializer_list<_Tp>, _Compare)’
 5805 |     max(initializer_list<_Tp> __l, _Compare __comp)
      |     ^~~
/usr/include/c++/13/bits/stl_algo.h:5805:5: note:   template argument deduction/substitution failed:
answer.code:33:17: note:   mismatched types ‘std::initializer_list<_Tp>’ and ‘int’
   33 |         mx = max(mx, ssize(item));
      |              ~~~^~~~~~~~~~~~~~~~~