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)]
import itertools
s = set()
for p in itertools.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')