#include <bits/stdc++.h>
using namespace std;
typedef signed long long ll;

#undef _P
#define _P(...) (void)printf(__VA_ARGS__)
#define FOR(x,to) for(x=0;x<(to);x++)
#define FORR(x,arr) for(auto& x:arr)
#define ITR(x,c) for(__typeof(c.begin()) x=c.begin();x!=c.end();x++)
#define ALL(a) (a.begin()),(a.end())
#define ZERO(a) memset(a,0,sizeof(a))
#define MINUS(a) memset(a,0xff,sizeof(a))
//-------------------------------------------------------

ll A,B;

ll issq(ll V) {
	ll a=sqrt(V);
	if(a*a==V) return 1;
	if((a-1)*(a-1)==V) return 1;
	if((a+1)*(a+1)==V) return 1;
	return 0;
}

void solve() {
	int i,j,k,l,r,x,y; string s;
	
	cin>>A>>B;
	ll G=__gcd(A,B);
	
	
	
	for(ll a=2;a*a*a<=G;a++) {
		while(G%(a*a)==0) G/=a*a;
		if(G%a==0) {
			ll b=G/a;
			if(issq(b)) G/=b;
			
		}
	}
	if(issq(G)) G=1;
	
	if(G==1) cout<<"Odd"<<endl;
	else cout<<"Even"<<endl;
	
}


int main(int argc,char** argv){
	string s;int i;
	if(argc==1) ios::sync_with_stdio(false), cin.tie(0);
	FOR(i,argc-1) s+=argv[i+1],s+='\n'; FOR(i,s.size()) ungetc(s[s.size()-1-i],stdin);
	cout.tie(0); solve(); return 0;
}