from math import * def factorization(n): arr = [] temp = n for i in range(2, int(-(-n**0.5//1))+1): if temp%i==0: cnt=0 while temp%i==0: cnt+=1 temp //= i arr.append([i, cnt]) if temp!=1: arr.append([temp, 1]) return arr A, B = map(int, input().split()) ans = 1 for _, a in factorization(gcd(A, B)): ans *= (a + 1) print("Odd") if ans % 2 else print("Even")