class Uguali{
    public static void main(String[] args) {
        testCoppiaUguali();
    }
    public static int coppiaUguali(int a[],int[] b) {
        int coppiaTrovata =0;
        int i,j,L,B;
        L = a.length;
        B = b.length;
        for (i=0; i<L; i++) {
            for (j=i; j<B; j++) {
                if (a[i] == b[j]) {
                    coppiaTrovata++;
                }
            }
        }
        return coppiaTrovata;
    }
    public static void testCoppiaUguali() {
        System.out.println(coppiaUguali(new int[] {1,2,3}, new int[] {1,3,7,8}));
        System.out.println(coppiaUguali(new int[] {1,2,3,4,5}, new int[] {3,5,8,9}));
        System.out.println(coppiaUguali(new int[] {1,2,4,5,6,7},new int[] {4,5,6,7}));
    }
}