import Control.Applicative ((<$>), (<*>))
import Control.Monad
import Data.List

main :: IO ()
main = do
  solve <$> getl (wrds toInt) >>= putStrLn

solve :: [Int] -> String
solve [a,b]
  | a > 0 = "Positive"
  | b < 0 = if even (b - a) then "Negative" else "Positive"
  | otherwise = "Zero"

toInt :: String -> Int
toInt = read

wrds :: (String -> a) -> String -> [a]
wrds f = map f . words

getl :: (String -> a) -> IO a
getl f = f <$> getLine
