read n k

for i in `seq "$k"`
do
	read -a "a${i}s"
done

result=(`seq "$n"`)

for i in `seq "$k"`
do
	temp=a${i}s[@]

	# ${result[@]} \= ${!temp}
	for j in "${!temp}"
	do
		for k in "${!result[@]}"
		do
			if [[ "${result[k]}" = "$j" ]]; then
				unset result[k]
			fi
		done
	done
done

echo "${#result[@]}"