content: import java.io.*;
  import java.math.*;
  import java.security.*;
  import java.text.*;
  import java.util.*;
  import java.util.concurrent.*;
  import java.util.regex.*;
  
  public class Solution {
  
    // Complete the twoArrays function below.
    static String twoArrays(int k, int[] A, int[] B) {
      Arrays.sort(A);
      Arrays.sort(B);
      for (int i = 0; i < A.length; i++) {
        if (A[i] + B[B.length - 1 - i] < k) {
          return "NO";
        }
      }
  
      return "YES";
    }
  
    private static final Scanner scanner = new Scanner(System.in);
  
    public static void main(String[] args) throws IOException {
      BufferedWriter bufferedWriter = new BufferedWriter(new FileWriter(System.getenv("OUTPUT_PATH")));
  
      int q = scanner.nextInt();
      scanner.skip("(\r\n|[\n\r\u2028\u2029\u0085])?");
  
      for (int qItr = 0; qItr < q; qItr++) {
        String[] nk = scanner.nextLine().split(" ");
  
        int n = Integer.parseInt(nk[0]);
  
        int k = Integer.parseInt(nk[1]);
  
        int[] A = new int[n];
  
        String[] AItems = scanner.nextLine().split(" ");
        scanner.skip("(\r\n|[\n\r\u2028\u2029\u0085])?");
  
        for (int i = 0; i < n; i++) {
          int AItem = Integer.parseInt(AItems[i]);
          A[i] = AItem;
        }
  
        int[] B = new int[n];
  
        String[] BItems = scanner.nextLine().split(" ");
        scanner.skip("(\r\n|[\n\r\u2028\u2029\u0085])?");
  
        for (int i = 0; i < n; i++) {
          int BItem = Integer.parseInt(BItems[i]);
          B[i] = BItem;
        }
  
        String result = twoArrays(k, A, B);
  
        bufferedWriter.write(result);
        bufferedWriter.newLine();
      }
  
      bufferedWriter.close();
  
      scanner.close();
    }
  }
  