#include<bits/stdc++.h>
using namespace std;
#define int long long
signed main(){
  int n,m;
  cin>>n>>m;
  if(n==1&&m==0){
    cout<<"Impossible"<<endl;
    return 0;
  }
  if(n==2&&m==0){
    cout<<"Impossible"<<endl;
    return 0;
  }
  cout<<"Possible"<<endl;
  return 0;
}