#include <iostream>
using namespace std; //cin, coutを使う
int main(){
	int H;
	int S;
	cin >> H >> S;
	if ((abs(H) % 2 + abs(S) % 2) % 2 == 0) {
		cout << "Impossible" << endl;
	} else {
		cout << "Possible" << endl;
	}
}