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

S = set()
dx = [-2, -2, -1, -1, 1, 1, 2, 2, 0]
dy = [-1, 1, -2, 2, -2, 2, -1, 1, 0]

for a in range(9):
    for b in range(9):
        for c in range(9):
            x = dx[a] + dx[b] + dx[c]
            y = dy[a] + dy[b] + dy[c]
            S.add((x, y))
            
print("YES") if (X, Y) in S else print("NO")