#include<stdio.h>
int main(){
    int n1,n2,i,j;
    scanf("%d",&n1);
    int list1[n1];
    for(i=0;i<n1;i++){
        scanf("%d",&list1[i]);
    }
    scanf("%d",&n2);
    int list2[n2];
    for(i=0;i<n2;i++){
        scanf("%d",&list2[i]);
    }
    for(i=0;i<n2;i++){
        for(j=0;j<n2;j++){
            if(list1[i]==list2[j]){
                printf("%d\n",list1[i]);
                return
            }
        }
    }
    printf("the two list do not intersect \n");
    return 0;
}