# include <bits/stdc++.h>
using namespace std;
namespace Base{
    # define mr make_pair
    typedef long long ll;
    typedef double db;
    const int inf = 0x3f3f3f3f, INF = 0x7fffffff;
    const ll  infll = 0x3f3f3f3f3f3f3f3fll, INFll = 0x7fffffffffffffffll;
    template<typename T> void read(T &x){
        x = 0; int fh = 1; double num = 1.0; char ch = getchar();
        while (!isdigit(ch)){ if (ch == '-') fh = -1; ch = getchar(); }
        while (isdigit(ch)){ x = x * 10 + ch - '0'; ch = getchar(); }
        if (ch == '.'){
            ch = getchar();
            while (isdigit(ch)){num /= 10; x = x + num * (ch - '0'); ch = getchar();}
        }
        x = x * fh;
    }
    template<typename T> void chmax(T &x, T y){x = x < y ? y : x;}
    template<typename T> void chmin(T &x, T y){x = x > y ? y : x;}
}
using namespace Base;

const int M = 1010, N = 100100;
int use[N], n;
vector <int> mp[M];
int main(){
    int T; read(T);
    while (T--){
        read(n);
        for (int i = 0; i < 1000; i++) mp[i].clear();
        for (int i = 1; i <= n; i++){
            int num; read(num);
            for (int j = 1; j <= num; j++){
                int t, p; read(t); read(p);
                int id = (t - 1) * 10 + (p - 1);
                mp[id].push_back(i);
            }
        }
        memset(use, inf, sizeof(use));
        use[1] = 0;
        for (int i = 0; i < 1000; i++){
            bool flag = false;
            for (unsigned j = 0; j < mp[i].size(); j++)
                if (use[mp[i][j]] <= i / 10) flag = true;
            if (!flag) continue;
            for (unsigned j = 0; j < mp[i].size(); j++)
                use[mp[i][j]] = min(use[mp[i][j]], i / 10 + 1);
        }
        printf("%d", 1);
        for (int i = 2; i <= n; i++)
            if (use[i] != inf){
                printf(" %d", i);
            }
        printf("\n");
    }
    return 0;
}