#include<stdio.h>

int linearSearch(int S[], int n, int key){
    int i=0;

    S[n] = key;

    while(S[i] != key){
        i++;
    }

    if(i==n){
        return 0;
    }

    return i;
}

int main(){
    int S[500000], key, i, n, q;

    scanf("%d", &n);
    for(i=0; i<n; i++){
        scanf("%d", &S[i]);
    }

    scanf("%d", &q);
    for(i=0; i<q; i++){
        scanf("%d", &key);
        linearSearch(S,n,key);
    }

    printf("%d\n", linearSearch(S,n,key));

}