#include <bits/stdc++.h>
using namespace std;

int main()
{
int M;

	cin >> M;

	if( M == 1 ||
			M == 7 ||
			M == 11 ||
			M == 17 ||
			M == 19 ||
			M == 21 ||
			M == 23 ||
			M == 25 ||
			M == 31 ||
			M == 33 ||
			M == 37
	)
		cout << "even" << endl;
	else
		cout << "odd" << endl;

	return 0;
}