#define _USE_MATH_DEFINES
#include<iostream>
#include <math.h>
#include <climits>
#include <algorithm>
#include <vector>
#include <queue>
#include <string>
using namespace std;

/* sample input

*/
int n, m;

int main()
{
	cin >> n >> m;

	if (m > 0){
		cout << "Possible" << endl;
	}
	else{
		if (n <= 2){
			cout << "Impossible" << endl;
		}
		else{
			cout << "Possible" << endl;
		}
	}
}