#include <bits/stdc++.h>
using namespace std;
int n, sum, x, a[1001], b[1001];
int main()
{
	freopen("running.in", "r", stdin);
	freopen("running.out", "w", stdout);
	cin >> n >> x ;
	for (int i = 1; i <= n; i++)
		cin >> a[i];
	for (int i = 1; i <= n; i++)
		cin >> b[i];
	for (int i = 1; i <= n; i++)
		if (a[i] > b[i])
			sum += a[i] - b[i];
	if (sum * x > 10000)
		cout << "2 hard 4 me";
	else
		cout << sum * x;
	fclose(stdin);
	fclose(stdout);
	return 0;
}