#include <bits/stdc++.h>
using namespace std;
long long int t, n, m;
long long int x, y;
long long int i, j;
char c;
void initialize(bool flag[], long long int n) {
  for (long long int i = 0; i < n; i++) flag[i] = false;
}
int main() {
  cin >> t;
  while (t--) {
    cin >> n;
    long long int s1 = 0, s2 = 0;
    long long int a[n];
    for (long long int i = 0; i < n; i++) cin >> a[i];
    for (long long int i = 0; i < n; i++) {
      if (a[i] % 2 == 0)
        s2++;
      else
        s1++;
    }
    if (s1 % 2 == 0)
      cout << "YES" << endl;
    else {
      bool flag[101];
      initialize(flag, (long long int)101);
      for (long long int i = 0; i < n; i++) flag[a[i]] = true;
      bool ans = false;
      for (i = 0; i < 100; i++) {
        if (flag[i] == true && flag[i + 1] == true) ans = true;
      }
      if (ans == true)
        cout << "YES" << endl;
      else
        cout << "NO" << endl;
    }
  }
  return 0;
}
