xg, yg = map(int, input().split())

s = [[0 for _ in range(-10, 11)] for _ in range(-10, 11)]

if xg < -10 or xg > 10 or yg < -10 or yg > 10:
    print("NO")

else:
    x, y = 0, 0

    flag = False     
    for i in range(3):
        for j in [(x-2,y-1),(x-2,y+1),(x-1,y-2),(x-1,y+2),(x+1,y-2),(x+1,y+2),(x+2,y-1),(x+2,y+1)]:
            if s[x][y] == s[xg][yg]:
                flag = True
                break

    if flag:
        print("YES")
    else:
        print("NO")