A.cpp

/*****                                            
 *                                                   __Bismillahir Rahmanir Rahim__
 *                                          American International University Bangladesh (AIUB) 
 *                                                         Hadiur Rahman Nabil
                                                                 
                                                               
                                                          
*****/
#include <bits/stdc++.h>
using namespace std;

#define endl '\n'

typedef long long ll;
typedef long double ld;

//Palindrome--
// for(int i=s.size()-1;i>=0;--i){s_rev.push_back(s[i]);} if(s==s_rev)    
 //Anagram--
 //sort(a.begin(), a.end());sort(b.begin(), b.end());if(a==b)
  
//Find_Last + Delete_Last--
//num%10    +   num/10
//Fibonacci--
//for(int i=1;i<=N-2;i++){ num3=num1(1)+num2(2);num1=num2;num2=num3(Fibonacci);


int main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(NULL); cout.tie(NULL);
   
        
ll n,t,x=0;
cin>>n>>t;
x=n+t;
if(n%3==0 || t%3==0 || x%3==0)
{
    cout<<"Possible"<<"\n";
}
else{
    cout<<"Impossible"<<"\n";
}

//cin>>n;
//for(int i=1;i<=n;i++)

    //cin>>

return 0;
}