#include <iostream>
#include <cstdlib>
using namespace std;

void Sort(int* _array, int N);
int Result(int* m, int* w, int N);

int main() {

  int T = 0;
  int N = 0;
  int i = 0;
  int j = 0;

  int* man;
  int* woman;
  int result = 0;

  cin >> T;

  for (i = 0; i < T; i++) {

    cin >> N;

    man = new int[N];
    woman = new int[N];

    for (j = 0; j < N; j++) {

      cin >> man[j];


    }

    for (j = 0; j < N; j++) {

      cin >> woman[j];

    }

    result = Result(man, woman, N);

    cout<<result<<endl;

    delete[] man;
    delete[] woman;

  }
  return 0;
}

int Result(int* m, int* w, int N) {
  int i = 0;
  int sum = 0;

  Sort(m, N);
  Sort(w, N);

  for (i = 0; i < N; i++) {
    sum += abs(m[i] - w[i]);
  }

  return sum;
}
void Sort(int* _array, int N) {

  int i = 0;
  int j = 0;
  int tmp = 0;
  int least = 0;

  for (i = 0; i < N - 1; i++) {

    least = i;

    for (j = i + 1; j < N; j++) {
      if (_array[j] < _array[least]) {
        least = j;
      }
    }
    tmp = _array[least];
    _array[least] = _array[i];
    _array[i] = tmp;
  }
}