#include <bits/stdc++.h>
using namespace std;
int main() {
  ios_base::sync_with_stdio(0);
  cin.tie(0);
  cout.tie(0);
  long long t;
  cin >> t;
  while (t--) {
    long long n;
    cin >> n;
    vector<long long> a(n), od, ev;
    for (int i = 0; i < n; i++) {
      cin >> a[i];
      if (a[i] & 1)
        od.push_back(a[i]);
      else
        ev.push_back(a[i]);
    }
    if (od.size() & 1) {
      for (int i = 0; i < od.size(); i++) {
        auto it = find(ev.begin(), ev.end(), od[i] + 1);
        auto nit = find(ev.begin(), ev.end(), od[i] - 1);
        if (it != ev.end()) {
          ev.erase(it);
          od.push_back(*it);
          break;
        } else if (nit != ev.end()) {
          ev.erase(nit);
          od.push_back(*nit);
          break;
        }
      }
    } else {
      if (ev.size() & 1) {
        long long done = 0;
        for (int i = 0; i < ev.size(); i++) {
          auto it = find(od.begin(), od.end(), ev[i] + 1);
          auto nit = find(od.begin(), od.end(), ev[i] - 1);
          if (it != ev.end()) {
            od.erase(it);
            ev.push_back(*it);
            break;
          } else if (nit != ev.end()) {
            od.erase(nit);
            ev.push_back(*nit);
            break;
          }
        }
      }
    }
    if (od.size() % 2 == 0 && ev.size() % 2 == 0) {
      cout << "YES" << endl;
    } else
      cout << "NO" << endl;
  }
  return 0;
}
