#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#include <string.h>

long long GCD(long long p, long long q) {
    if(p % q == 0) return q;
    else return GCD(q, p % q);
}
int main() {
    long long a, b;
    scanf("%lld %lld", &a, &b);

    long long gcd = GCD(a, b);

    double gcdSqrtRound = round(sqrt((double)gcd));

    char out[5] = "Even";

    if(fabs(gcdSqrtRound * gcdSqrtRound - gcd) < 1e-9) strcpy(out, "Odd");

    printf("%s\n", out);

    return 0;
}