#include <iostream>
using namespace std;

inline void func(int& x,int&y,int*p)
{
	x=y;
	*p=y;
}


int main()
{
	int n, x, y;
	cin >> n;
	for (int i = 0; i < n; i++)
	{
		cin >> x >> y;
		int *p;
		func(x, y, p);
		cout << x << " " << *p << endl;
	}
	return 0;
}