#include <iostream>
#include <fstream>
#include <windows.h>

using namespace std;

ifstream fin("file.in");
ifstream fout("file.out");

int fib[20], counter;

void generareFibo(int n)
{
    counter = 2;

    fib[0] = 1;
    fib[1] = 1;

    for(int i = 2;; i++, counter++)
    {
        fib[i] = fib[i - 1] + fib[i - 2];
        if(fib[i] >= n)
            break;
    }

}

bool calc()
{
    int a, b;
    while(fin >> a >> b)
    {
        if(a < b)
        {
            int aux = a;
            a = b;
            b = aux;
        }

        generareFibo(a);

        for(int i = 0; i < counter; i++)
        {
            if(fib[i] == b)
            {
                if(fib[i + 1] == a)
                    cout << "DA";
                else
                    cout << "NU";

                cout << endl;
                break;
            }
            if(i == counter - 1)fin >> a >> b;
                cout << "NU" << endl;
        }
    }
}

int main()
{
    calc();
    return 1;
}