#include<stdio.h>
void findIntersection(int *arr1,int n,int *arr2,int m){
    if(n<=0 || m<=0){
        printf("Invalid Input\n");
        return ;
    }
    int found_common = 0;
    for(int i=0;i<n;i++){
        for(int j=0;i<n;j++){
            if(*(arr1+i) == *(arr2 + j)){
                printf("%d",*(arr1 +i));
                found_common = 1;
                break;
            }
        }
    }
    if(!found_common){
        printf("No common elements\n");
    }
    printf("\n");
}
    int main(){
        int n,m;
        scanf("%d",&n);
        int arr[n];
        for(int i=0;i<n;i++){
            scanf("%d",&arr1[i]);
        }
        scanf("%d",&m);
        int arr2[m];
        for(int i=0;i<m;i++){
            scanf("%d",&arr2[i]);
        }
        findIntersection(arr1,n,arr2,m);
        return 0;
    }
}