#include<bits/stdc++.h>
using namespace std;
set<int> a,b,ab;
int main(){
	int n,m,x;
	cin>>n;
	for(int i=1;i<=n;i++){
		cin>>x;
		a.insert(x);
		ab.insert(x);
	}
	cin>>m;
	for(int i=1;i<=m;i++){
		cin>>x;
		b.insert(x);
		ab.insert(x);
	}
	for(auto it : a){
		if(b.count(it)) cout<<it<<" ";
	}
	cout<<"\n";
	for(auto it : ab){
		cout<<it<<" ";
	}
	cout<<"\n";
	for(auto it : a){
		if(!b.count(it))  cout<<it<<" ";
	}
	return 0;
}