#include <iostream>
#include <numeric>

int main()
{
    long long a, b;
    std::cin >> a >> b;
    long long g = std::gcd(a, b);
    for (int i = 1; 1LL * i * i <= g; ++i)
    {
        if (g % i == 0)
        {
            int count = 0;
            while (g % i == 0)
            {
                g /= i;
                ++count;
            }
            if (!(count & 1))
            {
                std::cout << "Even" << '\n';
            }
        }
    }
    std::cout << "Odd" << '\n';
    return 0;
}