#include<iostream>
using namespace std;
int main(){
  int n,m;
  cin>>n>>m;
  if(n==1 && m==0){
    cout<<"Impossible"<<endl;
  }else if(n==2 && m==0){
    cout<<"Impossible"<<endl;
  }else{
    cout<<"Possible"<<endl;
  }
  return 0;
}