#include <bits/stdc++.h>
using namespace std;
int main() {
  ;
  ios::sync_with_stdio(0);
  cin.tie(0);
  cout.tie(0);
  ;
  int t;
  cin >> t;
  while (t--) {
    int n;
    cin >> n;
    vector<int> odd, even;
    for (int i = 0; i < n; i++) {
      int x;
      cin >> x;
      if (x % 2 == 0)
        even.push_back(x);
      else
        odd.push_back(x);
    }
    sort(odd.begin(), odd.end());
    sort(even.begin(), even.end());
    while (even.size() % 2 != 0 || odd.size() % 2 != 0) {
      bool ok = false;
      for (int i = 0; i < odd.size(); i++) {
        for (int j = 0; j < even.size(); j++) {
          if (abs(odd[i] - even[j]) == 1) {
            ok = true;
            odd.erase(odd.begin() + i);
            even.erase(even.begin() + j);
            goto breakme;
          }
        }
      }
    breakme:
      if (!ok) break;
    }
    if (odd.size() % 2 == 0 && even.size() % 2 == 0)
      cout << "YES\n";
    else
      cout << "NO\n";
  }
  return 0;
}
