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);
}
}
}