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#include<fstream>
#include<iostream>
using namespace std;
ifstream f("nim.in");
ofstream g("nim.out");
int a[10005];
int t,n;
void NIM(int n)
{
if(n==1 && a[1]!=0){
g<<"DA\n";
return;
}
if(n==1 && a[1]==0){
g<<"NU\n";
return;
}
int var,i;
var=a[1] ^ a[2];
for(i=3;i<=n;i++)
var=var ^ a[i];
if(var!=0)
g<<"DA\n";
else
g<<"NU\n";
}
int main()
{
int i,j;
f>>t;
for(i=0;i<t;i++){
f>>n;
for(j=1;j<=n;j++)
f>>a[j];
NIM(n);
}
}