{-# LANGUAGE MultiWayIf #-}

main :: IO ()
main = do
  [a, b] <- map read . words <$> getLine
  putStrLn $ if
    | a > 0                 -> "Positive"
    | a == 0                -> "Zero"
    | b >= 0                -> "Zero"
    | (b - a) `mod` 2 == 0  -> "Negative"
    | otherwise             -> "Positive"
