import math

def prime(p):
    memo = []
    for i in range(1,(int(p**0.5)+1)):
        if p%i == 0:
            memo.append(i)
            if i != p//i:
                memo.append(p//i)
    return memo

a,b = map(int,input().split())

gcd_math = math.gcd(a, b)

memo = prime(gcd_math)
#print(memo)
if len(memo)%2 == 0:
    print('Even')
else:
    print('Odd')