#include <bits/stdc++.h>
using namespace std;
int main() {
  int n, m;
  cin >> n >> m;
  if (n == 0 && m == 0)
    cout << "0 0";
  else if (n == 0 && m != 0)
    cout << "Impossible";
  else {
    if (m == 0)
      cout << n << " " << n;
    else {
      cout << n + max(0, m - n) << " " << n + m - 1;
    }
  }
  return 0;
}
