#include<iostream>
using namespace std;
class fullexception{};
int main()
{
    int availableslots,students;
    cin>>availableslots;
    cin>>students;
    if(availableslots<0||students<0)
    {
        cout<<"Invalid input";
        return 0;
        
    }
    try
    {
        if(students>availableslots)
        {
            throw fullexception();
            
        }
        cout<<"Enrollement successful";
    }
    catch(fullexception)
    {
        cout<<|"Error: Insufficient Slots";
    }
    return 0;
}