#include <iostream>
#include <fstream>
using namespace std;
ifstream fin("date.in");
int main()
{
    int a,b,x,y,r;
    fin>>a>>b;
    x=a;
    y=b;
    r=a&b;
    while (r!=0){
        a=b;
        b=r;
        r=a&b;
    }
    if (b==1)
        cout<<"Da";
    else cout<<"Nu";
    return 0;
}