#include<bits/stdc++.h>
using namespace std;

int x[10][1010];

int main()
{
    freopen("running.in","r",stdin);
	freopen("running.out","w",stdout);
	int a,b,c;
    int ansa=0,ansb=0;
	cin>>a>>b;
    if(b>0) 
    {
   	    for(int i=1;i<=2;i++)
	    {
	        for(int j=1;j<=a;j++)
	        {
	            cin>>x[i][j];
            } 
        }
        for(int n=1;n<=a;n++)
	        {
	            ansa=ansa+x[1][n];
            }
            for(int m=1;m<=a;m++)
	            {
	                ansb=ansb+x[2][m];
                }
                c=ansa-ansb;
                if(c<=10000)cout<<c*b;
                else cout<<"2 hard 4 me";
    }
    else cout<<0;

    return 0;
}