x,y = map(int,input().split())
z = [(-2,-1),(-2,1),(-1,-2),(-1,2),(2,1),(2,-1),(1,2),(1,-2)]

res = "NO"
if abs(x) > 6 or abs(y) > 6 :
    res = "NO"
else :
    for i in range(len(z)) :
        if res == "YES" :
            break
        m1,n1 = z[i]
        if m1 == x and n1 == y :
            res = "YES"
            break
        for j in range(len(z)) :
            if res == "YES" :
                break
            m2,n2 = z[j]
            ma = m1 + m2
            na = n1 + n2
            if ma == x and na == y :
                res = "YES"
                break
            for k in range(len(z)) :
                m3,n3 = z[k]
                mb = ma + m3
                nb = na + n3
                if mb == x and nb == y :
                    res = "YES"
                    break
print(res)