#include <bits/stdc++.h>
using namespace std;
void solve() {
  long long n;
  cin >> n;
  long long a[n + 1], i, j, ans;
  long long mp[105] = {0};
  long long e = 0, o = 0;
  for (i = 1; i <= n; i++) {
    cin >> a[i];
    mp[a[i]]++;
    if (a[i] % 2)
      o++;
    else
      e++;
  }
  sort(a + 1, a + n + 1);
  long long m = n / 2;
  if (e % 2 == 0 && o % 2 == 0) {
    cout << "YES" << '\n';
  } else {
    long long curr = 0;
    for (i = 1; i <= 100; i++) {
      if (mp[i]) {
        long long x = mp[i];
        long long y = mp[i + 1];
        long long take = min(x, y);
        curr = curr + take;
        x = x - take;
        y = y - take;
      }
    }
    if (curr >= 1) {
      cout << "YES" << '\n';
    } else {
      cout << "NO" << '\n';
    }
  }
}
int32_t main() {
  ios_base::sync_with_stdio(false);
  cin.tie(NULL);
  cout.tie(NULL);
  long long t;
  t = 1;
  cin >> t;
  while (t--) {
    solve();
  }
}
