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