import sys


def input(): return sys.stdin.readline().rstrip('\n')


def main():
    a = [(-2, -1), (-2, 1), (2, -1), (2, 1),
         (-1, -2), (-1, 2), (1, -2), (1, 2), (0, 0)]
    x, y = map(int, input().split())
    for dx, dy in a:
        for dx2, dy2 in a:
            for dx3, dy3 in a:
                if (x, y) == (dx+dx2+dx3, dy+dy2+dy3):
                    print('YES')
                    return
    print('NO')


if __name__ == '__main__':
    main()