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