---

#include <iostream>
using namespace std;

int f(int a[], int n, int b[], int m) {
    int r = -1;
    for (int i = 0; i < n; i++)
        for (int j = 0; j < m; j++)
            if (a[i] == b[j] && (r == -1 || a[i] < r)) 
                r = a[i];
    return r;
}

int main() {
    int x1[] = {6, 5, 3, 4, 8, 2};
    int x2[] = {5, 1, 7, 3, 9, 0, 11, 4};
    
    cout << f(x1, 6, x2, 8);
    
    return 0;
}