Contest: Task: Related: TaskB

You are given two integers $a$ and $b$ ($a≤b$). Determine if the product of the integers $a$, $a+1$, $…$, $b$ is positive, negative or zero.

- $a$ and $b$ are integers.
- $-10^9≤a≤b≤10^9$

- In test cases worth $100$ points, $-10≤a≤b≤10$.

The input is given from Standard Input in the following format:

$a$ $b$

If the product is positive, print `Positive`

. If it is negative, print `Negative`

. If it is zero, print `Zero`

.

1 3

Positive

$1×2×3=6$ is positive.

-3 -1

Negative

$(-3)×(-2)×(-1)=-6$ is negative.

-1 1

Zero

$(-1)×0×1=0$.