#include <bits/stdc++.h>

using namespace std;

#define int long long

ifstream fin("running.in");
ofstream fout("running.out");
#define cin fin
#define cout fout

const int N = 1e3 + 10;

int n, x;
int a[N], b[N];

signed main()
{
	cin >> n >> x;
	for (int i = 1; i <= n; i++) cin >> a[i];
	int ans = 0;
	for (int i = 1; i <= n; i++) cin >> b[i], ans += (a[i] - b[i])*x;
	if (ans > 10000) cout << "2 hard 4 me";
	else cout << ans;		
}