V=[(-2,-1),(-2,1),(-1,-2),(-1,2),(1,-2),(1,2),(2,-1),(2,1)]
def f(x,y,n):
    if x==y==0:
        return 1
    elif n==0:
        return 0
    else:
        m=0
        for (a,b) in V:
            m=max(m,f(x-a,y-b,n-1))
        return m

X,Y=map(int,input().split())
if f(X,Y,3)==1:
    print("YES")
else:
    print("NO")