#include <bits/stdc++.h>
using namespace std;
#define int long long
int q[10000];
int w[10000];
signed main(){
	freopen("running.in","r",stdin);
	freopen("running.out","w",stdout);
	int a;
	cin>>a;
	int s;
	cin>>s;
	for(int i=0;i<a;i++){
		cin>>q[i];
	}
	for(int i=0;i<a;i++){
		cin>>w[i];
	}
	int temp = 0;
	for(int i=0;i<a;i++){
		int te = q[i] - w[i];
		temp = te*s+temp;
	}
 if(temp>10000){
 	cout<<"2 hard 4 me";
 	
 }else{
 	cout<<temp;
 }
	
	
	
	
	
}