Problem Statement

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.

Input

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

Output

If the product is positive, print Positive. If it is negative, print Negative. If it is zero, print Zero.

Constraints

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

Sample Input 1

1 3

Sample Output 1

Positive

1×2×3=6 is positive.

Sample Input 2

-3 -1

Sample Output 2

Negative

(-3)×(-2)×(-1)=-6 is negative.

Sample Input 3

-1 1

Sample Output 3

Zero

(-1)×0×1=0.

见题面 Input 部分

见题面 Output 部分