#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;
}
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