#!/usr/bin/env python3
# -*- coding: utf-8 -*-

x,y = map(int,input().split())

dx = [-2,-2,-1,-1, 1, 1, 2, 2]
dy = [-1, 1,-2, 2,-2, 2,-1, 1]

if x == 0 and y == 0:
    print("YES")
    exit()

if abs(x) + abs(y) > 9:
    print("NO")
    exit()

board = [[10 for i in range(13)] for j in range(13)]
board[6][6] = 0

for k in range(8):
    board[6+dy[k]][6+dx[k]] = 1

for j in range(13):
    for i in range(13):
        if board[j][i] == 1:
            for k in range(8):
                board[j+dy[k]][i+dx[k]] = 2

for j in range(13):
    for i in range(13):
        if board[j][i] == 2:
            for k in range(8):
                board[j+dy[k]][i+dx[k]] = 3

if board[x+6][y+6] <= 3:
    print("YES")
else:
    print("NO")