#include<bits/stdc++.h>
using namespace std;
int main()
{
int t;
cin >> t;
while(t--){
int m, n;
cin >> m >> n;
int arr[m];
int arr2[m];
for(int i = 0; i < m; i++){
cin >> arr[i];
}
for(int i = 0; i < m; i++){
cin >> arr2[i];
}
int sum=0;
for(int i=0;i<m;i++)
{
if(arr[i]>= n)
{
sum+=arr2[i];
}
}
cout<<sum<<endl;
}
return 0;
}
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