#include <iostream>
using namespace std;
const int TEN = 10;
int main() {
int n, secondDigi;
cin >> n;
int lastDigi = n % TEN;
n /= TEN;
secondDigi = n % TEN;
n /= TEN;
if (n > (secondDigi - lastDigi) * 2) {
cout << "DA";
} else {
cout << "NU";
}
return 0;
}
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