#include <iostream>
using namespace std;

const int TEN = 10;
const int HUNDRED = 100;
const int THOUSAND = 1000;

int main() {
	int n;
	cin >> n;
	int u = n % TEN;
    int z = (n / TEN) % TEN;
    int s = (n / HUNDRED) % TEN;
    int m = n / THOUSAND;

    if (n < THOUSAND) {
        if (u == z && z == s) {
            cout << "DA";
        } else if (u == z || u == s || z == s) {
            cout << "APROAPE";
        } else {
            cout << "NU";
        }
    } else {
        if (u == z && z == s && s == m) { 
            cout << "DA";
        } else if (
            (u == z && z == s && u != m) ||
            (u == z && z == m && u != s) ||
            (u == s && s == m && u != z) ||
            (z == s && s == m && z != u)
        ) {
            cout << "APROAPE";
        }else {
            cout << "NU";
        }
    }
	return 0;
}