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

#define lli long long int
#define REP(i,s,n) for(lli i=s;i<n;i++)
#define NUM 2520
#define INF (1LL<<50)
#define DEBUG 1
#define mp(a,b) make_pair(a,b)
#define SORT(V) sort(V.begin(),V.end())
#define PI (3.141592653589794)
#define TO_STRING(VariableName) # VariableName
#define LOG(x) if(DEBUG)cout<<TO_STRING(x)<<"="<<x<<" "<<endl;
#define LOG2(x,y) if(DEBUG)cout<<TO_STRING(x)<<"="<<x<<" "<<TO_STRING(y)<<"="<<y<<endl;
#define LOG3(x,y,z) if(DEBUG)cout<<TO_STRING(x)<<"="<<x<<" "<<TO_STRING(y)<<"="<<y<<" "<<TO_STRING(z)<<"="<<z<<endl;
#define LOG4(w,x,y,z) if(DEBUG)cout<<TO_STRING(w)<<"="<<w<<" "<<TO_STRING(x)<<"="<<x<<" "<<TO_STRING(y)<<"="<<y<<" "<<TO_STRING(z)<<"="<<z<<endl;

template<class T>bool chmax(T & a, const T & b) { if (a < b) { a = b; return 1; } return 0; }
template<class T>bool chmin(T& a, const T& b) { if (b < a) { a = b; return 1; } return 0; }

lli GCD(lli x, lli y)
{
    if(x<y)swap(x,y);
    if (y == 0) {
        return x;
    } else {
        return GCD(y, x % y);
    }
}

void solve(){

    lli a,b;
    cin>>a>>b;
    lli cnt = 0;

    lli gcd = GCD(a,b);

    lli small = 1,large = 1e9+1;
    while(small+1<large){
        lli middle = (small+large)/2;
        lli now = middle*middle;
        if(now<gcd){
            small = middle;
        }
        else{
            large = middle;
        }
    }
    if(small*small != gcd && large*large != gcd){
        cout<<"Even"<<endl;
    }
    else{
        cout<<"Odd"<<endl;
    }
    return;
}

int main(){
    // cout << fixed << setprecision(5);

    lli t=1;
    //cin>>t;
    while(t--)solve();

    return 0;
}