B

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

#define ll long long int

int main() {
    int t;
    cin >> t;
    while(t--){

        ll n,m;
        cin>>n>>m;

        ll ans=0;

        vector<ll> v1(n);
        vector<ll> v2(n);
        map<ll,ll> m1;
        map<ll,ll> m2;
        for (int i = 0; i < n; i++){
            cin>>v1[i];
            //m1[v1[i]%m]++;
        }
        for (int i = 0; i < n; i++){
            cin>>v2[i];
            m2[v2[i]%m]++;
        }

        for(int i=0;i<n;i++){
            ans+=m2[(m-(v1[i])%m)%m];
        }
        cout<<ans<<endl;
    }
}