#include <bits/stdc++.h>
using namespace std;

using int64 = long long;
using uint64 = unsigned long long;

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

    int N, M;
    cin >> N >> M;

    if ((N == 1 and M == 0) or (N == 2 and M == 0))
    {
        cout << "Impossible" << endl;
        return 0;
    }

    cout << "Possible" << endl;

    return 0;
}