#include<stdio.h>
int main(){
    int n,m;
    scanf("%d",&n);
    if(n<=0){
        printf("Invalid input");
        return 0;
    }
    int arr1[n];
    for(int i=0;i<n;i++){
        sacnf("%d",&arr1[i]);
    }
    sacnf("%d",&m);
    if(m<=0){
        printf("Invalid input");
        return 0;
    }
    int arr2[m];
    for(int i=0;i<n;i++){
        sacnf("%d",&arr2[i]);
    }
    int found=0;
    int *p1=arr1;
    int *p2=arr2;
    for(int i=0;i<n;i++){
        for(int j=o;j<m;j++){
            if(*(p1 + i)==*(p2 + j)){
                printf("%d",+(p1=i));
                found = 1;
                break;
            }
        }
    }
    if(!found){
        printf("No commen elements");
    }
    return 0;
    
}