import java.util.*;
//import java.lang.Math;

public class Practicer {

	public static void main(String[] args) {
		Scanner cin = new Scanner(System.in);

		final int ARRAY_SIZE = 9000000;

		int pairs = cin.nextInt();
		int numbers = cin.nextInt();


		for(int pair=0 ;pair < pairs; pair++){

			int[] arr1 = new int[ARRAY_SIZE];
			int counter=0;
			int number1,number2;

			for(int number=0;number<numbers;number++){
				number1 = cin.nextInt();
				arr1[number1] = 1;
			}
			for(int number=0;number<numbers;number++){
				number2 = cin.nextInt();
				if(arr1[number2]==1){
					counter++;
					arr1[number2]=0;
				}
			}

			System.out.println(counter);
		}


	 }
}