#include <bits/stdc++.h>
using namespace std;
int main() {
  ios_base::sync_with_stdio(false);
  cin.tie(NULL);
  int t;
  cin >> t;
  while (t--) {
    string s;
    cin >> s;
    int zero = 0, one = 0;
    for (char i : s)
      if (i == '0')
        zero++;
      else
        one++;
    if (min(zero, one) % 2 == 1)
      cout << "DA\n";
    else
      cout << "NET\n";
  }
}
