#include<bits/stdc++.h>
using namespace std;
int n;
int k[210];
int a[210][210];
bool b[210][210];
int bs[210];
int main(){
	cin>>n;
	for(int i=1;i<=n;i++){
		cin>>k[i];
		for(int j=1;j<=k[i];j++){
			cin>>a[i][j];
			b[a[i][j]][i]=1;
			bs[a[i][j]]++;
		}
	}
	for(int i=1;i<=n;i++){
		cout<<bs[i]<<" ";
		for(int j=1;j<=n;j++){
			if(b[i][j]==1) cout<<j<<" ";
		}
		cout<<endl;
	}
	return 0;
}