#include "bits/stdc++.h"
using namespace std;
typedef long long ll;
void Say(bool say, string a = "Yes", string b = "No"){cout << (say ? a : b) << endl;};

int main(){

    ll N, M;
    cin >> N >> M;
    if(N >= 3){
        cout << "Possible" << endl;
    }
    else{
        if(M == 0)cout << "Impossible" << endl;
        else cout << "Possible" << endl;
    }


    return 0;
}