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