#include <bits/stdc++.h>
using namespace std;
long long mat[15][15] = {
    {75, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0},
    {95, 64, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0},
    {17, 47, 82, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0},
    {18, 35, 87, 10, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0},
    {20, 04, 82, 47, 65, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0},
    {19, 01, 23, 75, 3, 34, 0, 0, 0, 0, 0, 0, 0, 0, 0},
    {88, 02, 77, 73, 7, 63, 67, 0, 0, 0, 0, 0, 0, 0, 0},
    {99, 65, 4, 28, 6, 16, 70, 92, 0, 0, 0, 0, 0, 0, 0},
    {41, 41, 26, 56, 83, 40, 80, 70, 33, 0, 0, 0, 0, 0, 0},
    {41, 48, 72, 33, 47, 32, 37, 16, 94, 29, 0, 0, 0, 0, 0},
    {53, 71, 44, 65, 25, 43, 91, 52, 97, 51, 14, 0, 0, 0, 0},
    {70, 11, 33, 28, 77, 73, 17, 78, 39, 68, 17, 57, 0, 0, 0},
    {91, 71, 52, 38, 17, 14, 91, 43, 58, 50, 27, 29, 48, 0, 0},
    {63, 66, 04, 68, 89, 53, 67, 30, 73, 16, 69, 87, 40, 31, 0},
    {4, 62, 98, 27, 23, 9, 70, 98, 73, 93, 38, 53, 60, 4, 23}};
long long summation() {
  long long sum = 0;
  long long ele = 0;
}
void func() {
  long long a, b;
  cin >> a >> b;
  cout << a << " " << (b / a) * a << endl;
}
int main() {
  ios_base::sync_with_stdio(false);
  cin.tie(NULL);
  cout.tie(NULL);
  int t;
  cin >> t;
  for (long long i = 1; i <= t; i++) {
    func();
  }
  return 0;
}
