#include <bits/stdc++.h>
using namespace std;
const double pi = 3.14159265358979323846;
int main() {
  ios_base::sync_with_stdio(false);
  cin.tie(NULL);
  cout.tie(NULL);
  int t;
  cin >> t;
  while (t--) {
    int n;
    cin >> n;
    vector<int> s(n);
    int even = 0;
    vector<int> pres(101, 0);
    for (int i = 0; i < n; i++) {
      cin >> s[i];
      pres[s[i]]++;
      if (s[i] % 2 == 0) {
        even++;
      }
    }
    if (even % 2 == 0) {
      cout << "YES" << '\n';
    } else {
      bool flag = false;
      for (int i = 1; i <= 99; i++) {
        if (pres[i] != 0 && pres[i + 1] != 0) {
          flag = true;
          break;
        }
      }
      if (flag) {
        cout << "YES" << '\n';
      } else {
        cout << "NO" << '\n';
      }
    }
  }
}
