#include<bits/stdc++.h>

#define x first
#define y second
#define y0 hi1
#define y1 hi2
#define ll long long
#define mp make_pair
#define pb push_back
#define sqr(a) (a)*(a)
#define ld long double
#define all(a) (a).begin(), (a).end()

using namespace std;

const int N = 100000;
const int M = 6;
const int inf = 2e9;

int a[N][M];

int main(){
    cin.tie(0);
    ios_base::sync_with_stdio(0);
    int T;
    cin >> T;
    while(T--){
        int n;
        cin >> n;

        bool tie = 0;
        int ans = -inf, num = -1;

        for(int i = 0; i < n; i++){
            int m;
            cin >> m;

            int a[M];
            memset(a, 0, sizeof(a));

            for(int j = 0; j < m; j++){
                int x;
                cin >> x;
                a[x - 1]++;
            }

            sort(a, a + M);
            reverse(a, a + M);

            int r = a[0] + a[1] + a[2] + a[3] + a[4] + a[5] + (a[3] - a[4]) + (a[4] - a[5]) * 2 + a[5] * 4;
            if(r > ans){
                tie = 0;
                ans = r;
                num = i + 1;
            } else
            if(r == ans){
                tie = 1;
            }
        }

        if(tie){
            cout << "tie\n";
        } else {
            if(num == 1){
                cout << "chef\n";
            } else {
                cout << num << "\n";
            }
        }
    }
}