import Control.Applicative ((<$>))
import Data.List (nub)

main :: IO ()
main = solve <$> map read <$> words <$> getLine >>= putStrLn

solve :: [Int] -> String
solve [x, y] | (x, y) `elem` db = "YES"
             | otherwise = "NO"
  where f (x, y) = [(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)]
        db0 = [(0,0)]
        db1 = db0 >>= f
        db2 = db1 >>= f
        db3 = db2 >>= f
        db = nub $ db0 ++ db1 ++ db2 ++ db3