#include<bits/stdc++.h>
using namespace std;
set<int> s;
vector<int> v;
int main()
{
	int n;
	scanf("%d", &n);
	for(int i=1;i<=n;i++)
	{
		cin>>v[i];
		for(int j=1;j<=n;j++)
		{
			int qp;
			cin>>qp;
			if(s.find(qp)==s.end())
			{
				v.push_back(qp);
				s.insert(qp);
			}
		}
		for(int j=0;j<=v.size();j++)
		{
			printf("%d",v[i]);
			cout<<" ";
		}
		cout<<endl;
		v.clear();
		s.clear();
	}
	return 0;
}