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