#include <bits/stdc++.h>
using namespace std;
int main() {
  ios_base::sync_with_stdio(0);
  cin.tie(0);
  int t;
  cin >> t;
  while (t--) {
    int n;
    cin >> n;
    vector<int> a(n);
    int even = 0, odd = 0;
    for (int i = 0; i < n; ++i) {
      cin >> a[i];
      if (a[i] % 2 == 0)
        even++;
      else
        odd++;
    }
    if (even % 2 == 0 && odd % 2 == 0) {
      cout << "YES\n";
    } else {
      int c = 1;
      vector<int> check(105, 0);
      for (int i = 0; i < n && c; ++i) {
        for (int j = i + 1; j < n; ++j) {
          if ((a[i] + a[j]) % 2 == 1 && check[a[j]] == 0 &&
              abs(a[i] - a[j]) == 1) {
            c--;
            check[a[j]] = 1;
          }
          if (c == 0) {
            break;
          }
        }
      }
      if (c == 0)
        cout << "YES\n";
      else
        cout << "NO\n";
    }
  }
}
