#include <iostream>
using namespace std;
int sumDiv(int n)
{
int s = 0;
for (int i = 1; i < n; i++)
{
if (n % i == 0)
{
s += i;
}
}
return s;
}
int main()
{
int a, b;
cin >> a >> b;
if (sumDiv(a) == b && sumDiv(b) == a)
{
cout << "DA";
}
else
{
cout << "NU";
}
return 0;
}