#include<fstream.h>
ifstream f("invers.in");
ofstream g("invers.out");
int a,inv,c,t,i,v[100],y;
int main()
{
	f>>t;
	for(i=1;i<=t;i++)
	f>>v[i];
	for(i=1;i<=t;i++)
	{
		y=v[i];
		inv=0;
		while(y)
		{
			c=y%10;
			y=y/10;
			inv=inv*10+c;
		}
		if(v[i]==v[i+1]+inv)
		g<<"DA"<<"\n";
		else
		g<<"NU"<<"\n";
	}
	f.close();
	g.close();
	return 0;

}