#include<bits/stdc++.h>
#define rep(i,a,b) for(int i=(a);i<=(b);i++)
#define per(i,a,b) for(int i=(a);i>=(b);i--)
#define REP(i,n) for(int i=0;i<(n);i++)
#define fi first
#define se second
#define pb push_back
#define mp make_pair
using namespace std;
typedef pair<int,int> pii;
typedef vector<int> vi;
typedef long long ll;

template<class T> void read(T &x){
    int f=0; x=0; char ch=getchar();
    for(;!isdigit(ch);ch=getchar()) f|=(ch=='-');
    for(;isdigit(ch);ch=getchar()) x=x*10+ch-'0';
    if(f) x=-x;
}

const int N=20005;
int flag[15],f[N],pos[N][105],n,len,t,p;

void rmain(){
    read(n);
    rep(i,1,n){
        read(len);
        rep(j,1,len){
            read(t),read(p);
            pos[i][t]=p;
        }
        f[i]=(i==1);
    }
    rep(T,1,100){
        memset(flag,0,sizeof flag);
        rep(i,1,n){
            if(!pos[i][T]) continue;
            flag[pos[i][T]]|=f[i];
        }
        rep(i,1,n){
            if(!pos[i][T]) continue;
            f[i]|=flag[pos[i][T]];
        }
    }
    rep(i,1,n){
        memset(pos[i],0,sizeof pos[i]);
    }
    vi ans;
    rep(i,1,n){
        if(f[i]) ans.pb(i);
    }
    int sz=ans.size();
    rep(i,0,sz-2){
        printf("%d ",ans[i]);
    }
    printf("%d\n",ans[sz-1]);
}

int main(){
    int T; read(T);
    while(T--) rmain();
    return 0;
}