#include<bits/stdc++.h>
using namespace std;
int main()
{
    int t;
    cin>>t;
    while(t--)
    {
        int n;
        cin>>n;
        int A[n+5],B[n+5],arr[n+5];
        int xa=0,xb=0;
        map<int,int>mp;
        for(int i = 0; i<n; i++)
        {
            cin>>A[i];
            xa^=A[i];
            arr[i]=A[i];
        }
        for(int i = 0;i<n; i++)
        {
            cin>>B[i];
            xb^=B[i];
            mp[B[i] ]++;
        }


       // cout<<xa<<" "<<xb<<endl;
      /*  if(xa!=xb)
        {
            cout<<-1<<endl;
            continue;
        }*/
        vector<int>v;
        int flag =0;
        for(int i = 0; i<n; i++)
        {
            if(mp[xb^xa^A[i]]>0)
            {
                mp[xa^xb^A[i] ]--;
                v.push_back(xb^xa^A[i]);

            }
            else
            {
                flag =1;
                break;
            }


        }

        if(!flag)
        {
            for(int i = 0; i<n-1; i++)
            {
                cout<<v[i]<<" ";
            }
            cout<<v[n-1]<<endl;
        }

        else cout<<-1<<endl;

    }




}