#include <bits/stdc++.h>
using namespace std;
const int M = 1000003;
struct Compare {
  constexpr bool operator()(pair<int, int> const& a,
                            pair<int, int> const& b) const noexcept {
    return (a.first < b.first) || (a.first == b.first && a.second < b.second);
  }
};
int main() {
  long long int n, i, t, k;
  cin >> n;
  long long int arr[2 * n];
  long long int sum = 0;
  for (long long int i = 0; i < 2 * n; i++) {
    cin >> arr[i];
    sum += arr[i];
  }
  long long int sum1 = 0;
  if (sum % 2 == 1) {
    for (long long int i = 0; i < 2 * n; i++) cout << arr[i] << " ";
  } else {
    sort(arr, arr + 2 * n);
    for (long long int i = 0; i < n; i++) {
      sum1 += arr[i];
    }
    if (sum1 == sum / 2) {
      cout << -1;
    } else {
      for (long long int i = 0; i < 2 * n; i++) cout << arr[i] << " ";
    }
  }
}
