#include <bits/stdc++.h>
using namespace std;
int main() {
  int t;
  scanf("%d", &t);
  while (t--) {
    int n, arr[60], maps[102] = {0}, ev = 0;
    scanf("%d", &n);
    for (int i = 0; i < n; i++) {
      scanf("%d", &arr[i]);
      maps[arr[i]]++;
      if (arr[i] % 2 == 0) ev++;
    }
    bool ans = true;
    if (ev % 2 == 1) {
      ans = false;
      for (int i = 0; i < n; i++) {
        if (arr[i] % 2 == 0) {
          if (maps[arr[i] + 1] > 0 || maps[arr[i] - 1] > 0) {
            ans = true;
            break;
          }
          ev--;
        }
        if (!ev) break;
      }
    }
    printf("%s\n", ans ? "YES" : "NO");
  }
  return 0;
}
