#include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #define ll long long int #define pb push_back #define rep(i,n) for(int i=0;i<(n);i++) #define REP(i,n) for(int i=1;i<=(n);i++) using namespace std; int mx8[] = {0,0,1,-1,-1,1,-1,1}; int my8[] = {-1,1,0,0,-1,-1,1,1}; int mx4[] = {1,-1,0,0}; int my4[] = {0,0,-1,1}; const int MOD = 1000000007; ll y[10000005]; int main() { ll a,b; cin >> a >> b; ll g = __gcd(a,b); ll s = sqrt(g); if(s*s == g) cout << "Odd" << endl; else cout << "Even" << endl; }