#include <stdio.h>
#include <stdlib.h>
?
int main(void){
????int n, q, i, j;
????int *S, *T;
????int cnt;
?
????scanf("%d", &n);
????S = (int*)malloc(sizeof(int)*n);
????for(i = 0; i < n; i++){
????????scanf("%d", S+i);
????}
?????
????scanf("%d", &q);
????T = (int*)malloc(sizeof(int)*q);
????for(i = 0; i < q; i++){
????????scanf("%d", T+i);
????}
?
????for(i = 0; i < n; i++){
????????for(j = 0; j < q; j++){
????????????if(S[i] == T[j]){
????????????????cnt++;
                break;
????????????}
????????}
????}
?
????printf("%d\n", cnt);
?
????free(S);
????free(T);
?
????return 0;
}