X, Y = map(int, input().split())
M = [[0, 0],
     [-2, -1], [-2, +1], [-1, -2], [-1, +2],
     [+1, -2], [+1, +2], [+2, -1], [+2, +1]]


for x1, y1 in M:
    for x2, y2 in M:
        for x3, y3 in M:
            if (x1 + x2 + x3 == X) and (y1 + y2 + y3 == Y):
                print('YES')
                exit()

print('NO')