#include <bits/stdc++.h>
using namespace std;
#define modulo 1000000007
#define mod(mod_x) ((((long long)mod_x+modulo))%modulo)
#define Inf 1000000000000000000



int main(){
	
	long long A,B;
	cin>>A>>B;
	long long G = gcd(A,B);
	
	long long ok = 1000000000,ng = 0LL;
	while(ok-ng>1){
		long long mid = (ok+ng)/2;
		if(mid*mid>=G)ok = mid;
		else ng = mid;
	}
	
	if(ok*ok==G)cout<<"Odd"<<endl;
	else cout<<"Even"<<endl;
	
	return 0;
}