#include <bits/stdc++.h>
#include <atcoder/all>
using namespace std;
using namespace atcoder;
typedef long long ll;
#define rep(i, n) for (int i = 0; i < n; i++)
#define chmin(x, y) x = min(x, y)
#define chmax(x, y) x = max(x, y)

int main(){
    string s , t ;
    cin >> s >> t ;
    ll n = s.size() ;
    ll m = t.size() ;
    if( s[n-1] == '1' && t[m-1] == '1' ){
        cout << "Odd" << endl ;
    }
    else cout << "Even" << endl ;

}