#include <stdio.h>
#include <stdlib.h>

#define DEBUG if(0)

void insertionSort(int v[], int size) {
	int i, currentValue, prevIndex;
	for(i = 1; i < size; i++) {
		currentValue = v[i];
		prevIndex = i - 1;
		while(prevIndex >= 0 && currentValue < v[prevIndex]) {
			v[prevIndex + 1] = v[prevIndex];
			prevIndex--;
		}
		v[prevIndex + 1] = currentValue;
	}
}

void printIntersection(int a[], int b[],int size) {
	int i = 0, j = 0;
	while(i < size && j < size) {
		if(a[i] < b[j])
			i++;
		else if(b[j] < a[i])
			j++;
		else {
			printf("%d\n", b[j++]);
			i++;
		}
	}
}

int main() {
	int size, i;
	scanf("%d", &size);
	DEBUG printf("**** SIZE%d\n", size);
	int* a = (int*) malloc(sizeof(int) * size);
	int* b = (int*) malloc(sizeof(int) * size);
	for(i = 0; i < size; i++)
		scanf("%d", &a[i]);
	for(i = 0; i < size; i++)
		scanf("%d", &b[i]);
	DEBUG {
		printf("*** arrays:\n");
		for(i = 0; i < size; i++)
			printf("%d ", a[i]);
		printf("\n");
		for(i = 0; i < size; i++)
			printf("%d ", b[i]);
		printf("\n");
	}
	insertionSort(a, size);
	insertionSort(b, size);
	printIntersection(a, b, size);
	free(a);
	free(b);
	return 0;
}