#include <iostream>
using namespace std;
const int TEN = 10;
const int X = 77;
int main() {
int n, res;
cin >>n;
if ((n % (TEN * TEN) == X) || ((n / TEN) % (TEN * TEN) == X) || (n / (TEN * TEN) == X)) {
cout << "DA";
} else {
cout << "NU";
}
return 0;
}
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