x = [0, -2, -2, -1, -1, 1, 1, 2, 2]
y = [0, -1, 1, -2, 2, -2, 2, -1, 1]

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

ans = 'NO'

for i in range(9):
	for j in range(9):
		for k in range(9):
			if (X, Y) == (x[i]+x[j]+x[k], y[i]+y[j]+y[k]):
				ans = 'YES'

print(ans)