#include using namespace std; #define int long long #define rep(i,s,n) for(int i = s;i=(s);i--) #define all(v) (v).begin(),(v).end() #define pb push_back #define fi first #define se second #define chmin(a,b) a=b #define chmax(a,b) a=b typedef long long ll; typedef pairpint; typedef vectorvint; typedef vectorvpint; typedef pair P1; typedef pair P2; typedef pairPP; static const ll maxLL = (ll)1 << 62; const ll MOD=1000000007; const ll INF=1e18; int dx[]={0,0,1,-1}; int dy[]={-1,1,0,0}; int N,M; signed main(){ cin.tie(0); ios::sync_with_stdio(false); cin>>N>>M; if((N==1||N==2)&&M==0)cout<<"Impossible"<<"\n"; else cout<<"Possible"<<"\n"; return 0; }