#include <iostream>
#include <set>

std::set<std::pair<int, int>>
    outs{{1, 0}, {2, 0}, {3, 3}};

void solve() {
    std::pair<int, int> p;
    std::cin >> p.first >> p.second;
    std::cout << (outs.count(p) ? "Impossible" : "Possible") << "\n";
}

int main() {
    std::cin.tie(nullptr);
    std::ios::sync_with_stdio(false);

    solve();

    return 0;
}