#include <bits/stdc++.h>
using namespace std;
#define int long long
typedef pair<int,int> P;
int INF = 1e9+7;
int mod = 1e9+7;
int dx[4] = {1, 0, -1, 0};
int dy[4] = {0, 1, 0, -1};
int gcd(int X,int Y) {
    if(X%Y == 0) {
        return Y;
    }
    else {
        return gcd(Y,X%Y);
    }
}
signed main() {
    int A,B;
    cin >> A >> B;
    int X = gcd(A,B);
    int cnt = 1;
    for(int i = 2; i*i <= X; i++) {
        int res = 0;
        if(X%i == 0) {
            while(X%i == 0) {
                res++;
                X/=i;
            }
        }
        cnt*=(res+1);
    }
    if(X != 1) {
        cnt*=2;
    }
    if(cnt%2 == 0) {
        cout << "Even" << endl;
    }
    else {
        cout << "Odd" << endl;
    }
}