#include <iostream>
using namespace std;

int main() 
{
	int z,l,a;
	cin>>z>>l>>a;
	if(a<1850 || a>2500 || z<0 || l<0 && z>31 || l>12)
		cout<<"NU";
	else
	{
		if(l==2)
			if(a%4==0 && a%100!=0 || a%400==0)
				if(z>29)
					cout<<"NU";
				else
					cout<<"DA";
			else
				if(z>28)
					cout<<"NU";
				else
					cout<<"DA";
		else
			if(l==4 || l==6 || l==9 || l==11)
				if(z>30)
					cout<<"NU";
				else
					cout<<"DA";
			else
				cout<<"DA";
	}
	
	return 0;
}