#include <bits/stdc++.h>
using namespace std;
using ll = long long;

long long in()
{
    long long result = 0;
    while (1) {
        int c = getchar_unlocked();
        if (c < '0' || c > '9') {
            break;
        }
        result = 10 * result + (c - '0');
    }
    return result;
}

char buf[20];
void out(long long n) {
    int i = 0;
    buf[i++] = '0' + (n % 10);
    n /= 10;
    for (; n != 0; i++, n /= 10) {
        buf[i] = '0' + (n % 10);
    }
    while (i != 0) {
        putchar_unlocked(buf[--i]);
    }
    putchar_unlocked('\n');
}

ll isqrt(ll n) {
    ll ok = 0;
    ll ng = 3037000500;
    while (ng - ok > 1) {
        ll m = ok + (ng - ok) / 2;
        if (m * m <= n) {
            ok = m;
        } else {
            ng = m;
        }
    }
    return ok;
}

int main() {
    ll A, B;
    A = in();
    B = in();

    ll X = gcd(A, B);

    if (isqrt(X) * isqrt(X) == X) {
        puts("Odd");
    } else {
        puts("Even");
    }

    return 0;
}