#include<bits/stdc++.h>
using namespace std;
using LL = long long;
using ULL = unsigned long long;
#define rep(i,n) for(int i=0; i<(n); i++)

ULL GCD(ULL a, ULL b) { return b ? GCD(b, a % b) : a; }

int main() {
    ULL a, b; cin >> a >> b;
    ULL g = GCD(a, b);
    ULL l, r; l = 0; r = 1000000001;
    while (l + 1 < r) {
        ULL m = (l + r) / 2;
        if (m * m <= g) l = m;
        else r = m;
    }

    if (l * l == g) cout << "Odd" << endl;
    else cout << "Even" << endl;

    return 0;
}