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