starf

//#include<bits/stdc++.h>
#include<iostream>
#include<vector>

#define long long long
#define nln '\n'

using namespace std;

// GLobal variables: t

int main()
{
    long t;
    cin >> t;
    for (long i = 0; i != t; ++i)
    {
        long n, s;
        cin >> n >> s;
        vector<bool> tic(n, 0);
        for (long j = 0; j != n; ++j)
        {
            long x;
            cin >> x;
            if (x <= s)
                tic[j] = 1;
        }
        long got = 0;
        for (long j = 0; j != n; ++j)
        {
            long x;
            cin >> x;
            if (tic[j])
                got += x;
        }
        cout << got << nln;
    }
    return 0;
}