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

#define rep(i, n) for (int i = 0; i < (int)(n); i++)
#define rep2(i, s, n) for (int i = (s); i < (int)(n); i++)
#define i64 int_fast64_t

const i64 INF = INT64_MAX;
const i64 ERR = INT64_MIN;
const i64 MOD = 998244353;

int main() {
  string A,B;
  cin>>A>>B;
  if(A.at(A.size()-1)=='1'&&B.at(B.size()-1)=='1'){
    cout<<"Odd"<<endl;
  }else{
    cout<<"Even"<<endl;
  }
}