#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef unsigned long long ull;
#define Rep(i,a,b) for(register int i=(a);i<=(b);++i)
#define rep(i,a,b) for(register int i=(a);i<(b);++i)
#define Dep(i,a,b) for(register int i=(a);i>=(b);--i)
#define mem(x,v) memset(x,v,sizeof(x))
#define gc getchar
#define pc putchar
inline ll read(){
    ll x = 0,f = 0;char c = gc();
    for(;!isdigit(c);c=gc()) f|=(c=='-');
    for(;isdigit(c);c=gc()) x = x * 10 + (c - '0');
    return f ? -x : x;
}
inline void write(ll x){if(x < 0) pc('-'),x=-x;if(x>=10) write(x / 10);pc(x%10+'0');}
inline void writeln(ll x){write(x),pc('\n');}
inline void wri(ll x){write(x),pc(' ');}
const int N=20005;
int n;
int vis[N];
vector<int> vec[105][14];
void solve(){
    memset(vis,false,sizeof(vis));
    n=read();
    int t=100,p=10;
    Rep(i,1,t)Rep(j,1,p)vec[i][j].clear();
    Rep(i,1,n){
        int len=read();
        while (len--){
            int t=read(),p=read();
            vec[t][p].push_back(i);
        }
    }
    vis[1]=1;
    Rep(i,1,t)Rep(j,1,p){
        int f=0;
        for(auto k:vec[i][j]) f|=vis[k];
        if(f) for(auto k:vec[i][j]) vis[k]|=f;
    }
    int flag=0;
    Rep(i,1,n) if(vis[i]){
        if(flag) pc(' ');
        flag=true;
        write(i);
    }
    puts("");
}
int main(){
    int T=read();
    while (T--)
        solve();
    return 0;
}