#!/bin/sh
read a b
n=0
if [ ${a} = "0" -o  ${b} = "0" ]
then
	echo Zero
elif [ "${a::1}" = "-" -a  "${b::1}" != "-" ]
then
	echo Zero
elif [ "${a::1}" = "-" -a  "${b::1}" = "-" ]
then
	n=$(( b - a ))
	[[ $(( n % 2 )) -eq 1 ]] && echo Positive
	[[ $(( n % 2 )) -eq 0 ]] && echo Negative
else
	echo Positive
fi
