from itertools import product


X, Y = map(int, input().split())

dir=[(0,0),(-2,-1),(-2,1),(-1,-2),(-1,2),(1,-2),(1,2),(2,-1),(2,1)]
s=set()
for p in product(dir,repeat=3):
    x,y=0,0
    for i in range(3):
        dx,dy=p[i]
        x+=dx
        y+=dy
    s.add((x,y))

if (X,Y) in s:
    print("YES")
else:
    print("NO")