#include <iostream>
#include <string>
using namespace std;
template <int N>
struct day {
string name;
day() : name( day<N-1>().name + " Eve" ) {}
};
template <>
struct day<0> {
string name;
day() : name("Xmas") {}
};
int main()
{
cout << day<3>().name << endl;
return 0;
}