#include <bits/stdc++.h>
using namespace std;
void solve() {
  int n;
  string s;
  cin >> s;
  n = s.size();
  int z = 0, o = 0;
  for (int i = 0; i < n; i++) {
    if (s[i] == '1')
      o++;
    else
      z++;
  }
  if (min(o, z) & 1) {
    cout << "DA\n";
  } else {
    cout << "NET\n";
  }
}
int32_t main() {
  ios_base::sync_with_stdio(false);
  cin.tie(NULL);
  int t;
  cin >> t;
  while (t--) {
    solve();
  }
  return 0;
}
