#include<cstdio>
using namespace std;
int n,a[1000005],b[1000005],my,x,f=0;
int main()
{
    freopen("XORcipher.in","r",stdin);
    freopen("XORcipher.out","w",stdout);
    scanf("%d",&n);
    for(int i=1;i<=n;i++) scanf("%d",a+i);
    for(int i=1;i<=n;i++) scanf("%d",b+i);
    for(int i=1;i<=n;i++)
    {
        my=a[1]^b[i];
        f=0;
        for(int j=2;j<=n;j++)
        {
            x=my^a[i];
            for(int k=1;k<=n;k++)
            {
                if(k==i) continue;
                if(x==b[k]) goto Label;
            }
            f=1;
            break;
            Label:;
        }
        if(f==0) {printf("%d\n",my);return 0;}
    }
    return 0;
}