#include<iostream>
using namespace std;
int M;
int f[41]={0,
0,1,1,1,1,1,0,1,1,1,
0,1,1,1,1,1,0,1,0,1,
0,1,0,1,0,1,1,1,1,1,
0,1,0,1,1,1,0,1,1,1};
main()
{
	cin>>M;
	cout<<(f[M]?"odd":"even")<<endl;
}