#include<cstdio>
#include<cmath>

long long gcd(long long a,long long b){ return b?gcd(b,a%b):a; }

int main(){
    long long a,b;
    scanf("%lld%lld",&a,&b);
    long long g = gcd(a,b);
    long long kg = sqrt(g);
    if(kg*kg==g) printf("Odd\n");
    else printf("Even\n");
    return 0;
}