#include using namespace std; #define REP(i,a,n) for(int i=(a); i<(int)(n); i++) #define rep(i,n) REP(i,0,n) #define FOR(it,c) for(__typeof((c).begin()) it=(c).begin(); it!=(c).end(); ++it) #define ALLOF(c) (c).begin(), (c).end() typedef long long ll; typedef unsigned long long ull; bool solve(int N, int M){ if(N == 1) return false; if(N == 2){ if(M==0) return false; else return true; } return true; } int main(){ int N, M; cin >> N >> M; if(solve(N, M)) cout << "Possible" << endl; else cout << "Impossible" << endl; return 0; }