#include <bits/stdc++.h>
using namespace std;
const long long INF = 1e18L + 5;
const int inf = 1e9 + 5;
struct comp {
  bool operator()(pair<int, int> p1, pair<int, int> p2) {
    if (p1.first < p2.first) return false;
    if (p2.first < p1.first) return true;
    return p1.second < p2.second;
  };
};
long long min_ops(vector<long long> arr, int n) {
  sort(arr.begin(), arr.end());
  long long mid = arr[n / 2];
  long long mid1 = arr[(n / 2) - 1];
  long long res = 0, res1 = 0;
  for (int i = 0; i < n; i++) {
    res = res + abs(arr[i] - mid);
    res1 = res1 + abs(arr[i] - mid1);
  }
  return min(res, res1);
}
long long power(long long base, long long exponent) {
  long long result = 1;
  while (exponent != 0) {
    result *= base;
    --exponent;
  }
  return result;
}
bool isPrime(int n) {
  if (n <= 1) return false;
  for (int i = 2; i <= sqrt(n); i++)
    if (n % i == 0) return false;
  return true;
}
int main() {
  ios_base::sync_with_stdio(false);
  cin.tie(NULL);
  cout.tie(NULL);
  int test = 1;
  cin >> test;
  while (test--) {
    int n, x;
    cin >> n >> x;
    vector<int> a(n), b(n);
    for (int i = 0; i < n; i++) cin >> a[i];
    for (int i = 0; i < n; i++) cin >> b[i];
    sort(a.begin(), a.end(), greater<int>());
    sort(b.begin(), b.end());
    bool flag = true;
    for (int i = 0; i < n; i++) {
      if ((a[i] + b[i]) > x) {
        flag = false;
        break;
      }
    }
    if (flag)
      cout << "Yes" << endl;
    else
      cout << "No" << endl;
  }
}
