#include <iostream>

using namespace std;
using LL = long long;

int nums[10];

int main() {
    int N;
    cin >> N;

    int A, B, C, D;
    string R;
    for (int i = 0; i < N; i++) {
        cin >> A >> B >> C >> D >> R;
        if (R == "NO") {
            nums[A] = -1;
            nums[B] = -1;
            nums[C] = -1;
            nums[D] = -1;
        } else {
            nums[A] += nums[A] != -1 ? 1 : 0;
            nums[B] += nums[B] != -1 ? 1 : 0;
            nums[C] += nums[C] != -1 ? 1 : 0;
            nums[D] += nums[D] != -1 ? 1 : 0;
        }
    }

    int ans = -1, max_ = -1;
    for (int i = 0; i <= 9; i++) {
        if (nums[i] > max_) {
            max_ = nums[i];
            ans = i;
        }
    }
    cout << ans << endl;
}