#include<stdio.h>
#include<limits.h>

int main() {
    int n, m;
    if (scanf("%d", &n) != 1) return 0;
    
    if(n <= 0) {
        printf("Invalid Input");
        retrun 0;
    }
    int arr1[1005];
    
    for(int i = 0; i < n; ++i) {
        scanf("%d", &arr[i]);
    }
    
    if (scanf("%d", &m) != 1) return 0;
    if (m <= 0) {
        printf("Inavlid Input");
        return 0;
    }
    int arr2[1005];
    for (int j = 0; j < m; ++j) {
        scanf("%d", &arr2[j]);
    }
    int foundAny = 0;
    
    for (int i = 0; i <n; ++i) {
        int *p1 = &arr1[i];
        int val = *p1;
        int alreadyPrinted = 0;
        for(int x = 0; x < i; ++x) {
            int *prev = &arr[x];
             if (*prev == val) { alreadyPrinted = 1; break; }
        }
        
        if (presentInSecond) {
            if (foundAny) printf(" ");
            pritnf("%d", val);
            foundAny = 1;
        }
    }
    if (! foundAny) {
        printf("No common elements");
    }
    return 0;
}