import java.io.IOException;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Scanner;

public class Main {

public static void main(String[] args) throws NumberFormatException, IOException {
    // TODO Auto-generated method stub
    Scanner sc = new Scanner(System.in);
    int C = sc.nextInt();
    ArrayList<Integer> ru;
    ArrayList<Integer> ko;
    ArrayList<Integer> result;
    int curRu, win;
    int N;
    for(int i=0;i<C;i++)
    {
        N = sc.nextInt();
        ru= new ArrayList<Integer>();
        ko= new ArrayList<Integer>();
        result= new ArrayList<Integer>();
        win = 0;
        for(int j=0; j<N ; j++)
        {
            ru.add(sc.nextInt());
        }

        for(int j=0; j<N ; j++)
        {
            ko.add(sc.nextInt());
        }
        Collections.sort(ko);
        Collections.reverse(ko);
        Collections.sort(ru);
        Collections.reverse(ru);

        for(int j=0; j<N ; j++)
        {
            curRu = ru.get(j);
            //동일값이 있을경우.
            if(ko.contains(curRu))
            {
                result.add(ko.remove(ko.indexOf(curRu)));
                win++;
            }else if(curRu>ko.get(0))//아예 작으면 제일 작은숫자를 내놔
            {   
                result.add(ko.remove(ko.size()-1));
            }else
            {
                for(int k=0;k<ko.size();k++)
                {
                    if(curRu<ko.get(ko.size()-1-k))
                    {
                        result.add(ko.remove(ko.size()-1-k));
                        win++;
                    }
                }
            }
        }

// System.out.println(ru.toString());
// System.out.println(result.toString());
System.out.println(win);
}
}
}