#include<stdio.h>

int main(){
    int n,m;
    scanf("%d",&n);
    
    if(n<=0){
        printf("Invalid Input\n");
        return 0;
    }
    
    int arr1[n];
    for(int i=0;i<n;i++){
        scanf("%d",arr1+i);
    }
    
    scanf("%d",&m);
    
    if(m<=0){
        printf("Invalid Input\n");
        retrun 0;
    }
    
    int arr2[m];
    for(int i=0;i<m;i++){
        scanf("%d",arr2 + i);
    }
    
    int found=0;
    
    for(int i=0;i<n;i++){
        int *p2 =arr2;
        for(int j=0;j<m;j++){
            if(*(arr1+i)==*(p2+j)){
                printf("%d",(arr1+i));
                found=1;
                break;
            }
        }
    }
    
    if(!found){
        printf("No common elements");
    }
    printf("\n");
    return 0;
}